follow @PCDSUKThe clinical chapters provide concise guidance about dermatological conditions and their management. Where there is diagnostic uncertainty refer to the diagnostic tables.
A
- Acanthosis nigricans (Last Updated: 30/12/2015)
- Acne: acne conglobata (Last Updated: 24/04/2017)
- Acne: acne excoriee (Last Updated: 24/04/2017)
- Acne: acne fulminans (Last Updated: 24/04/2017)
- Acne: acne vulgaris (Last Updated: 24/04/2017)
- Acne: macrocomedones (Last Updated: 23/11/2014)
- Acne: prepubertal (Last Updated: 23/11/2014)
- Acne: sandpaper acne (Last Updated: 23/11/2014)
- Acne keloidalis nuchae (Last Updated: 23/11/2014)
- Acquired (digital) fibrokeratoma (Last Updated: 25/09/2013)
- Acquired fibrous nodule (Last Updated: 25/09/2013)
- Acquired ichthyosis (Last Updated: 20/11/2015)
- Acral Peeling Skin syndrome (Last Updated: 26/11/2015)
- Acrocyanosis (Last Updated: 11/08/2015)
- Acrodermatitis enteropathica (Last Updated: 21/06/2016)
- Acrokeratosis verruciformis (of Hopf) (Last Updated: 30/12/2015)
- Acropustulosis of infancy (Last Updated: 22/06/2016)
- Actinic granuloma (Last Updated: 17/09/2015)
- Actinic keratosis (syn. solar keratosis) (Last Updated: 24/04/2017)
- Actinic prurigo (Last Updated: 08/08/2015)
- Acute generalized exanthematous pustulosis (AGEP) (Last Updated: 18/01/2013)
- Addison’s disease (Last Updated: 28/11/2013)
- Adverse cutaneous drug reactions (Last Updated: 02/11/2014)
- Albinism - oculocutaneous albinism (Last Updated: 04/07/2016)
- Allergy tests (Last Updated: 19/09/2012)
- Alopecia - an overview (Last Updated: 24/04/2017)
- Alopecia - male and female pattern (Last Updated: 24/04/2017)
- Alopecia areata (Last Updated: 24/04/2017)
- Amputation stump neuroma (Last Updated: 22/08/2014)
- Amyloidosis - cutaneous (Last Updated: 13/04/2016)
- Anagen effluvium (Last Updated: 15/12/2013)
- Anderson-Fabry disease (Last Updated: 20/01/2013)
- Anetoderma (Last Updated: 02/07/2016)
- Angioedema (without urticaria) (Last Updated: 20/12/2016)
- Angiofibromas (Last Updated: 27/08/2013)
- Angiokeratoma (Last Updated: 06/08/2015)
- Angioleiomyoma (Last Updated: 24/04/2013)
- Angiolipoma (Last Updated: 30/05/2013)
- Angiolymphoid hyperplasia with eosinophilia (Last Updated: 31/10/2014)
- Angioma (acquired) - including cherry angioma / Campbell de Morgan spots (Last Updated: 31/10/2014)
- Angioma serpiginosum (Last Updated: 19/01/2013)
- Angiosarcoma (syn. malignant haemangioendothelioma) (Last Updated: 23/11/2014)
- Angular cheilitis (syn. angular stomatitis) (Last Updated: 27/01/2017)
- Annular erythema (Last Updated: 27/09/2015)
- Anthrax (Last Updated: 05/08/2015)
- Antiphospholipid syndrome (Last Updated: 14/05/2015)
- Antisynthetase syndrome (Last Updated: 15/05/2015)
- Aphthous ulcers (Last Updated: 05/08/2016)
- Apocrine carcinoma (Last Updated: 30/06/2013)
- Apocrine hidrocystoma (Last Updated: 30/06/2013)
- Appendageal tumours (Last Updated: 27/04/2017)
- Aquagenic pruritus (Last Updated: 18/01/2013)
- Argyria (Last Updated: 28/11/2013)
- Ash-leaf spots (Last Updated: 27/08/2013)
- Aspergillus (Last Updated: 22/07/2015)
- Atrophic glossitis (Last Updated: 05/08/2016)
- Atrophoderma of Pasini and Pierini (Last Updated: 23/06/2015)
- Atrophoderma vermiculatam (Last Updated: 02/03/2015)
- Atypical (dysplastic) melanocytic naevus (Last Updated: 25/04/2017)
- Atypical fibroxanthoma (Last Updated: 23/11/2014)
- Autoantibodies (Last Updated: 05/07/2016)
- Autosomal recessive congenital ichthyosis (Last Updated: 20/11/2015)
B
- Bacillary angiomatosis (Last Updated: 22/07/2015)
- Balanitis (Last Updated: 19/03/2017)
- Bartholin’s cysts (Last Updated: 15/08/2016)
- Basal cell carcinoma - an overview (Last Updated: 24/04/2017)
- Basal cell carcinoma: morphoeic (infiltrative) (Last Updated: 01/11/2014)
- Basal cell carcinoma: multicomponent (syn. multifocal) (Last Updated: 01/11/2014)
- Basal cell carcinoma: solid (syn. nodular / cystic) (Last Updated: 24/04/2017)
- Basal cell carcinoma: superficial (Last Updated: 01/11/2014)
- Basex’s acrokeratosis paraneoplastica (Last Updated: 19/08/2016)
- Basosquamous carcinoma (Last Updated: 09/02/2017)
- Beau’s lines (Last Updated: 02/05/2016)
- Becker’s naevus (Last Updated: 24/04/2017)
- Bed bugs (Cimex lectularius) (Last Updated: 24/08/2014)
- Behçet syndrome (Last Updated: 05/08/2016)
- Benign melanoytic naevi (acquired and dermal naevi ie common moles) (Last Updated: 06/07/2016)
- Birt-Hogg-Dube syndrome (Last Updated: 30/06/2013)
- Blaschko’s lines (Last Updated: 27/01/2017)
- Blistering (bullous) disorders - an overview (Last Updated: 06/07/2016)
- Blue naevus (Last Updated: 23/11/2014)
- Blue Rubber Bleb Naevus syndrome (Last Updated: 01/11/2014)
- Body dysmorphic disorder (Last Updated: 18/08/2016)
- Body lice (syn. pediculosis corporis) (Last Updated: 23/11/2014)
- Boils (Last Updated: 06/07/2016)
- Bowen’s disease (Last Updated: 24/04/2017)
- Bowenoid papulosis (Last Updated: 12/08/2016)
- Brachioradial pruritus (Last Updated: 18/01/2013)
- Brooke-Spiegler syndrome (Last Updated: 30/06/2013)
- Bullous pemphigoid (Last Updated: 06/09/2015)
C
- Cafe-au-lait patch (Last Updated: 14/04/2013)
- Calcification of the skin and subcutaneous tissues (syn. calcinosis cutis) (Last Updated: 08/12/2016)
- Calcinosis cutis (Last Updated: 02/06/2016)
- Calciphylaxis (Last Updated: 21/12/2014)
- Campbell de Morgan spots (Last Updated: 19/01/2013)
- Candidal infection (syn. candidiasis; candidosis; moniliasis) (Last Updated: 15/08/2016)
- Capillaritis (Last Updated: 17/06/2015)
- Carbuncles (Last Updated: 03/11/2014)
- Carcinoid syndrome (Last Updated: 19/08/2016)
- Carcinoma cuniculatum (syn. epithelioma cuniculatum, verrucous carcinoma) (Last Updated: 01/11/2014)
- Cellulitis, erysipelas, and necrotising fasciitis (Last Updated: 06/07/2016)
- Chancroid (Last Updated: 09/11/2015)
- Chickenpox (syn. varicella) (Last Updated: 23/02/2014)
- Chikungunya (Last Updated: 09/11/2015)
- Chilblains (Last Updated: 10/08/2015)
- Child abuse and domestic violence - cutaneous features (Last Updated: 18/08/2016)
- Childhood granulomatous periorificial dermatitis (syn. facial Afro-Caribbean childhood eruption) (Last Updated: 09/05/2016)
- Chondrodermatitis nodularis helicis (Last Updated: 08/11/2016)
- Chronic actinic dermatitis (Last Updated: 08/11/2016)
- Chronic bullous disease of childhood (Last Updated: 16/10/2014)
- Chronic superficial scaly dermatitis syn. parapsoriasis; digitate dermatosis (Last Updated: 24/04/2017)
- Churg-Strauss syndrome (syn. allergic granulomatous angiitis) (Last Updated: 27/06/2015)
- Cicatricial alopecia (Last Updated: 17/12/2013)
- Clear cell acanthoma of Degos (Last Updated: 23/11/2014)
- Clubbing (Last Updated: 02/05/2016)
- Cockade naevus (syn. Naevus en cocarde) (Last Updated: 27/12/2014)
- Combined naevus (Last Updated: 27/12/2014)
- Comedo naevus (syn. comedone naevus; naevus comedonicus; follicular naevus) (Last Updated: 16/04/2015)
- Condylomata acuminata (Last Updated: 14/09/2013)
- Confluent and reticulate papillomatosis (syn. Gougerot-Carteaud syndrome) (Last Updated: 09/12/2015)
- Congenital melanocytic naevus (Last Updated: 24/04/2017)
- Connective tissue disorders - an overview (Last Updated: 06/07/2016)
- Corns and callosities (syn. calluses) (Last Updated: 06/07/2016)
- Costal fringe (Last Updated: 19/01/2013)
- Cow’s Milk Protein Allergy (Last Updated: 19/07/2013)
- Cowden syndrome (syn. multiple hamartoma syndrome) (Last Updated: 30/06/2013)
- Cryoglobulinaemic vasculitis (Last Updated: 27/06/2015)
- Cryoproteins (Last Updated: 19/09/2012)
- Cryptococcus (Last Updated: 22/07/2015)
- Cryptosporidiosis (Last Updated: 22/07/2015)
- Cutaneous horn (Last Updated: 24/04/2017)
- Cutaneous larva migrans (Last Updated: 09/11/2015)
- Cutaneous leiomyoma (Last Updated: 01/11/2014)
- Cutaneous lymphoma (Last Updated: 24/11/2014)
- Cutaneous metastases (Last Updated: 06/07/2015)
- Cutaneous small vessel vasculitis (syn. leucocytoclastic vasculitis) (Last Updated: 27/06/2015)
- Cutis laxa (Last Updated: 02/07/2016)
- Cylindroma (Last Updated: 30/06/2013)
- Cytomegalovirus (Last Updated: 22/07/2015)
D
- Darier’s disease (Last Updated: 24/04/2017)
- Delusion of parasitosis (Last Updated: 18/01/2013)
- Dengue fever (Last Updated: 09/11/2015)
- Dercum’s disease (syn. adiposis dolorosa) (Last Updated: 03/06/2013)
- Dermatitis (Last Updated: 17/01/2017)
- Dermatitis artefacta (a type of self-harm) (Last Updated: 20/03/2017)
- Dermatitis herpetiformis (Last Updated: 08/11/2016)
- Dermatofibroma (syn. histiocytoma) (Last Updated: 24/04/2017)
- Dermatofibrosarcoma protuberans (Last Updated: 01/11/2014)
- Dermatomyositis (including polymyositis) (Last Updated: 24/04/2017)
- Dermatosis papulosa nigra (Last Updated: 28/11/2013)
- Dermoid cyst (Last Updated: 01/11/2014)
- Desmoplastic naevus (Last Updated: 02/07/2015)
- Diffuse large B-cell lymphoma (Last Updated: 22/08/2013)
- Discoid lupus erythematosus (Last Updated: 14/05/2015)
- Dissecting cellulitis (Last Updated: 17/12/2013)
- Disseminate and recurrent infundibulofolliculitis (Last Updated: 23/11/2014)
- Drug Hypersensitivity syndrome (syn. Drug Rash with Eosinophilia and Systemic Symptoms or DRESS) (Last Updated: 02/11/2014)
- Drug rashes - an overview (Last Updated: 06/07/2016)
- Drug rashes: mild to moderate (Last Updated: 19/03/2017)
- Drug rashes: photosensitive (Last Updated: 10/11/2013)
- Drug rashes: severe (Last Updated: 16/07/2015)
- Dyskeratosis congenita (syn. the Zinsser-Engman-Cole syndrome) (Last Updated: 28/11/2013)
E
- Eccrine hidrocystoma (Last Updated: 30/06/2013)
- Eccrine poroma (Last Updated: 30/06/2013)
- Ecthyma (including ecthyma gangrenosum) (Last Updated: 30/07/2015)
- Eczema - atopic eczema (Last Updated: 24/04/2017)
- Eczema: asteatotic eczema (syn. xerotic eczema, eczema craquele) (Last Updated: 02/11/2014)
- Eczema: contact allergic dermatitis (including latex and rubber allergy) (Last Updated: 02/11/2014)
- Eczema: discoid (syn. nummular) eczema (Last Updated: 08/11/2016)
- Eczema: eczema herpeticum (Last Updated: 24/04/2017)
- Eczema: gravitational eczema (syn. varicose eczema or stasis dermatitis) (Last Updated: 20/12/2016)
- Eczema: hand (and foot) eczema (Last Updated: 19/03/2017)
- Eczema: napkin eczema (Last Updated: 02/11/2014)
- Ehlers-Danlos syndrome (Last Updated: 02/07/2016)
- Elastosis perforans serpiginosa (Last Updated: 24/12/2015)
- Elephantiasis (Last Updated: 08/07/2016)
- Emollients (Last Updated: 06/07/2016)
- En coup de sabre (Last Updated: 10/05/2015)
- ENA-positive annular erythema (Last Updated: 16/09/2015)
- Eosinophilic cellulitis (syn. Wells syndrome) (Last Updated: 09/08/2015)
- Eosinophilic fasciits (Last Updated: 09/08/2015)
- Eosinophilic folliculitis (Last Updated: 24/08/2014)
- Ephelides (syn. freckles) (Last Updated: 24/04/2017)
- Epidermal naevi - an overview (Last Updated: 20/11/2015)
- Epidermodysplasia verruciformis (Last Updated: 30/12/2015)
- Epidermoid cyst (syn. epithelial cyst. Sebaceous cyst is a misnomer) (Last Updated: 08/11/2016)
- Epidermolysis bullosa (Last Updated: 17/01/2015)
- Epidermolysis bullosa acquisita (Last Updated: 17/01/2015)
- Epidermolytic hyperkeratosis (syn. bullous ichthyosiform erythroderma) (Last Updated: 20/11/2015)
- Erosive pustular dermatosis of the scalp (Last Updated: 13/10/2014)
- Eruptive vellus hair cysts (Last Updated: 10/05/2016)
- Eruptive xanthomata (Last Updated: 08/09/2013)
- Erysipelas (Last Updated: 04/03/2015)
- Erysipeloid (Last Updated: 09/08/2015)
- Erythema (chronicum) migrans - the cutaneous features of Lyme disease (Last Updated: 27/09/2015)
- Erythema ab igne (Last Updated: 02/07/2016)
- Erythema annulare centrifugum (Last Updated: 15/09/2015)
- Erythema dyschromicum perstans (syn. ashy dermatosis) (Last Updated: 23/11/2014)
- Erythema elevatum diutinum (Last Updated: 23/05/2016)
- Erythema gyratum repens (Last Updated: 15/09/2015)
- Erythema infectiosum (syn. fifth disease; slapped cheek syndrome) (Last Updated: 30/01/2014)
- Erythema multiforme (Last Updated: 18/11/2016)
- Erythema nodosum (Last Updated: 06/07/2016)
- Erythrasma (Last Updated: 27/01/2017)
- Erythroderma (syn. exfoliative dermatitis) (Last Updated: 27/07/2015)
- Erythrokeratoderma variabilis (Last Updated: 26/11/2015)
- Erythromelalgia (Last Updated: 18/11/2016)
- Erythromelanosis follicularis faciei et colli (Last Updated: 05/03/2015)
- Erythroplasia of Queyrat / Bowen’s disease of the penis / bowenoid papulosis (Last Updated: 12/08/2016)
- Exercise-induced vasculitis (Last Updated: 27/06/2015)
- Exogenous ochronosis (Last Updated: 28/11/2013)
- Extramammary Paget’s disease (Last Updated: 30/06/2013)
F
- Fibroepithelioma of Pinkus (Last Updated: 02/11/2014)
- Fibrofolliculoma (Last Updated: 30/06/2013)
- Fibrous papule (Last Updated: 23/11/2014)
- Fibrous tumours (Last Updated: 03/11/2014)
- Fissured tongue (Last Updated: 05/08/2016)
- Fixed drug eruption (Last Updated: 18/01/2013)
- Flegel’s disease (Last Updated: 24/12/2015)
- Florid cutaneous papillomatosis (Last Updated: 19/08/2016)
- Flushing (Last Updated: 06/07/2016)
- Focal dermal hypoplasia (Last Updated: 25/06/2016)
- Follicle centre cell lymphoma (Last Updated: 22/08/2013)
- Follicular mucinosis (Last Updated: 22/08/2013)
- Folliculitis and boils (furuncles / carbuncles) (Last Updated: 24/11/2016)
- Folliculitis barbae (Last Updated: 07/11/2014)
- Folliculitis decalvans (Last Updated: 24/11/2016)
- Folliculotropic mycosis fungoides (Last Updated: 22/08/2013)
- Food allergy (including cow’s milk protein allergy) (Last Updated: 06/07/2016)
- Fordyce spots (syn. Fordyce’s granules) (Last Updated: 07/04/2015)
- Foreign bodies (including penetrating injuries and tattoos) (Last Updated: 23/11/2014)
- Fox-Fordyce disease (syn. apocrine miliaria) (Last Updated: 24/11/2016)
- Frey Syndrome (Last Updated: 23/02/2014)
- Frontal fibrosing alopecia (Last Updated: 18/01/2013)
- Furuncles (Last Updated: 03/11/2014)
G
- Ganglion (Last Updated: 18/11/2016)
- Gardner syndrome (Last Updated: 30/06/2013)
- Generalised essential telangiectasia (Last Updated: 19/01/2013)
- Genital leiomyoma (Last Updated: 24/04/2013)
- Geographic tongue (Last Updated: 05/08/2016)
- Gianotti-Crosti syndrome (syn. papular acrodermatitis of childhood) (Last Updated: 30/01/2014)
- Giant cell arteritis (Last Updated: 27/06/2015)
- Giant comedone (Last Updated: 05/01/2015)
- Glomus tumour (Last Updated: 30/07/2015)
- Gougerot-Blum syndrome (pigmented purpuric lichenoid dermatosis) (Last Updated: 17/06/2015)
- Gouty tophi (Last Updated: 08/11/2014)
- Gram-negative folliculitis (Last Updated: 08/11/2014)
- Granuloma annulare (Last Updated: 24/11/2016)
- Granuloma faciale (Last Updated: 24/04/2017)
- Granuloma inguinale (syn. Donovanosis) (Last Updated: 09/11/2015)
- Granulomatous rosacea (Last Updated: 09/05/2016)
- Granulosis rubra nasi (Last Updated: 14/04/2016)
- Grover’s disease (syn. transient acantholytic dermatosis) (Last Updated: 23/11/2014)
H
- Habit-tic nail deformity (Last Updated: 02/05/2016)
- Haemangioma and other vascular tumours and malformations (Last Updated: 06/07/2016)
- Haemochromatosis (Last Updated: 28/11/2013)
- Hailey-Hailey disease (syn. familial benign chronic pemphigus) (Last Updated: 27/01/2017)
- Hairy tongue (Last Updated: 05/08/2016)
- Half-and-half nails (Last Updated: 02/05/2016)
- Halo naevus (syn. Sutton naevus) (Last Updated: 06/07/2016)
- Hand, foot and mouth disease (Last Updated: 30/01/2014)
- Harlequin ichthyosis (Last Updated: 20/11/2015)
- Head lice (syn. pediculosis capitis) (Last Updated: 24/11/2016)
- Henoch-Schönlein purpura (Last Updated: 27/06/2015)
- Hereditary haemorrhagic telangiectasia (syn. Rendu-Osler-Weber syndome) (Last Updated: 19/01/2013)
- Hereditary leiomyomatosis and renal cell cancer (HLRCC) (Last Updated: 24/04/2013)
- Herpes simplex (Last Updated: 24/04/2017)
- Herpes zoster (syn. shingles) (Last Updated: 24/04/2017)
- Hidradenitis suppurativa (syn. acne inversa) (Last Updated: 24/04/2017)
- Hidradenoma (Last Updated: 30/06/2013)
- Hidradenoma papilliferum (Last Updated: 30/06/2013)
- Hidroacanthoma simplex (Last Updated: 30/06/2013)
- Hirsutism (Last Updated: 29/05/2017)
- Histiocytoses (Last Updated: 18/06/2016)
- Histoplasmosis (Last Updated: 22/07/2015)
- HIV and AIDS - cutaneous features (Last Updated: 30/07/2015)
- Hori’s naevus (Last Updated: 05/12/2013)
- Human flea (Pulex irritans) (Last Updated: 24/08/2014)
- Hydroa vacciniforme (Last Updated: 08/08/2015)
- Hyperandrogenism (Last Updated: 07/08/2017)
- Hyperhidrosis (excessive sweating) (Last Updated: 24/04/2017)
- Hyperpigmentation - of the face and neck (Last Updated: 24/04/2017)
- Hypertrichosis (Last Updated: 15/02/2013)
- Hypertrophic scars (Last Updated: 31/05/2013)
- Hypocomplementaemia (Last Updated: 19/09/2012)
- Hypomelanosis of Ito (Last Updated: 22/06/2016)
I
- Ichthyosis (Last Updated: 24/04/2017)
- Ichthyosis hystrix (Last Updated: 20/11/2015)
- Ichthyosis vulgaris (Last Updated: 20/11/2015)
- Idiopathic eruptive macular pigmentation (Last Updated: 04/07/2016)
- Idiopathic guttate hypomelanosis (Last Updated: 04/04/2016)
- Immunofluorescence (Last Updated: 19/09/2012)
- Immunohistochemistry (Last Updated: 19/09/2012)
- Impetigo (Last Updated: 24/11/2016)
- Incontinentia pigmenti (Last Updated: 22/06/2016)
- Infantile digital fibromatosis (Last Updated: 15/11/2014)
- Inflammatory linear verrucous epidermal naevus (ILVEN) (Last Updated: 23/11/2014)
- Intertrigo (Last Updated: 15/08/2016)
- Inverted follicular keratosis (Last Updated: 30/06/2013)
- Itching purpura (Last Updated: 17/06/2015)
J
- Jessner’s lymphocytic infiltrate (syn. Jessner-Kanof syndrome) (Last Updated: 24/04/2017)
- Juvenile plantar dermatosis (Last Updated: 06/07/2016)
- Juvenile spring eruption (Last Updated: 15/11/2014)
- Juvenile xanthogranuloma (Last Updated: 30/07/2015)
K
- Kaposi’s sarcoma (syn. Kaposi’s haemorrhagic sarcoma) (Last Updated: 30/07/2015)
- Kawasaki disease (Last Updated: 30/07/2015)
- Keloid scars (Last Updated: 06/07/2016)
- Keratoacanthoma (Last Updated: 24/04/2017)
- Keratoderma (Last Updated: 24/12/2015)
- Keratolysis exfoliativa (Last Updated: 26/11/2015)
- Keratosis lichenoides chronica (syn. Nekam’s disease) (Last Updated: 12/06/2016)
- Keratosis pilaris (and its variants) (Last Updated: 13/12/2016)
- Keratosis rubra pilaris faciei atrophicans (syn. ulerythema ophryogenes) (Last Updated: 02/03/2015)
- Kerion (Last Updated: 15/11/2014)
- Klippel-Trenaunay syndrome (Last Updated: 19/01/2013)
- Knuckle pads (syn. Garrod’s pads; holoderma) (Last Updated: 16/05/2016)
- Koilonychia (Last Updated: 02/05/2016)
- Kyrle’s disease (Last Updated: 24/12/2015)
L
- Lamellar ichthyosis (Last Updated: 20/11/2015)
- Lamellar nail dystrophy (Last Updated: 02/05/2016)
- Langerhans cell histiocytosis (Last Updated: 10/09/2016)
- Lassueur Graham-Little Piccardi Syndrome (Last Updated: 18/01/2013)
- Late-onset (non-classical) congenital adrenal hyperplasia (Last Updated: 15/02/2013)
- Latex and rubber allergy (Last Updated: 18/01/2013)
- Leg ulcers (and disorders of venous insufficiency) (Last Updated: 17/10/2016)
- Leiomyoma (Last Updated: 10/05/2013)
- Leiomyosarcoma (Last Updated: 15/11/2014)
- Leishmaniasis (Last Updated: 09/11/2015)
- Lentigo (syn. lentigine) (Last Updated: 02/02/2017)
- Lentigo maligna (Last Updated: 06/07/2016)
- Leprosy (Last Updated: 09/11/2015)
- Leser-Trélat sign (Last Updated: 19/08/2016)
- Leucocytoclastic vasculitis (Last Updated: 27/06/2015)
- Leukaemia cutis (Last Updated: 22/08/2013)
- Leukonychia (Last Updated: 02/05/2016)
- Leukoplakia (and other white patches in the mouth) (Last Updated: 19/11/2014)
- Lice (syn. Phthiraptera) (Last Updated: 26/06/2014)
- Lichen aureus (Last Updated: 17/06/2015)
- Lichen myxoedematosus (Last Updated: 01/06/2016)
- Lichen nitidus (Last Updated: 17/03/2016)
- Lichen planopilaris (Last Updated: 18/01/2013)
- Lichen planus (Last Updated: 24/04/2017)
- Lichen planus - follicular lichen planus (Last Updated: 24/11/2016)
- Lichen planus pigmentosus (Last Updated: 05/11/2013)
- Lichen sclerosus (syn. lichen sclerosus et atrophicus) (Last Updated: 29/06/2017)
- Lichen scrofulosorum (Last Updated: 29/10/2015)
- Lichen simplex (syn. circumscribed neurodermatitis) (Last Updated: 13/12/2016)
- Lichen spinulosus (syn. keratosis spinulosa) (Last Updated: 30/12/2015)
- Lichen striatus (Last Updated: 04/04/2016)
- Lichenoid eruption (Last Updated: 14/09/2012)
- Lichenoid keratosis (syn. lichen planus-like keratosis) (Last Updated: 21/11/2014)
- Light microscopy (Last Updated: 19/09/2012)
- Linear and whorled naevoid hypermelanosis (Last Updated: 25/06/2016)
- Linear atrophoderma of Moulin (Last Updated: 25/06/2016)
- Linear IgA disease (syn. chronic bullous disease of childhood; linear IgA bullous dermatosis) (Last Updated: 06/09/2015)
- Lipoatrophy, lipodystrophy, and panatrophy (Last Updated: 02/07/2016)
- Lipodermatosclerosis (Last Updated: 16/01/2015)
- Lipoma (Last Updated: 06/07/2016)
- Lipomatosis (Last Updated: 30/05/2013)
- Liposarcoma (Last Updated: 21/11/2014)
- Liquid nitrogen (Last Updated: 06/07/2016)
- Livedo reticularis (Last Updated: 12/07/2015)
- Livedoid vasculopathy (Last Updated: 27/06/2015)
- Longitudinal melanonychia (Last Updated: 02/05/2016)
- Lupus erythematosus (Last Updated: 07/06/2017)
- Lupus pernio (Last Updated: 11/01/2016)
- Lupus vulgaris (Last Updated: 29/10/2015)
- Lyme disease (and erythema migrans) (Last Updated: 24/04/2017)
- Lymphangioma circumscriptum (Last Updated: 21/11/2014)
- Lymphocytoma cutis (Last Updated: 02/10/2015)
- Lymphoedema (Last Updated: 24/04/2017)
- Lymphogranuloma venerum (Last Updated: 09/11/2015)
- Lymphoma and leukaemia - cutaneous presentations (Last Updated: 28/04/2017)
- Lymphomatoid papulosis (Last Updated: 22/08/2013)
M
- Majocchi’s purpura (purpura annularis telangiectodes) (Last Updated: 17/06/2015)
- Malaria (Last Updated: 09/11/2015)
- Malassezia folliculitis (syn. pityrosporum folliculitis) (Last Updated: 21/11/2014)
- Malignant eccrine poroma (syn. porocarcinoma) (Last Updated: 30/06/2013)
- Marginal zone lymphoma (Last Updated: 22/08/2013)
- Mastocytoma (Last Updated: 24/04/2017)
- Mastocytosis (Last Updated: 24/04/2017)
- Materia alba (Last Updated: 05/08/2016)
- Maturational dyschromia (Last Updated: 28/11/2013)
- McCune-Albright syndrome (Last Updated: 27/06/2016)
- Measles (Last Updated: 30/01/2014)
- Median nail dystrophy (Last Updated: 02/05/2016)
- Median rhomboid glossitis (Last Updated: 05/08/2016)
- Melanocytic naevi (Last Updated: 25/04/2017)
- Melanoma - an overview (Last Updated: 25/04/2017)
- Melanoma: acral-lentiginous melanoma (including subungual melanoma) (Last Updated: 16/04/2016)
- Melanoma: lentigo maligna melanoma (including lentigo maligna) (Last Updated: 25/04/2017)
- Melanoma: nodular melanoma (Last Updated: 01/01/2015)
- Melanoma: superficial spreading melanoma (including melanoma in situ) (Last Updated: 17/11/2015)
- Melasma (syn. chloasma) (Last Updated: 06/07/2016)
- Meningococcal septicaemia (Last Updated: 12/07/2015)
- Merkel cell carcinoma (Last Updated: 16/08/2017)
- Meyerson’s naevus (Last Updated: 21/11/2014)
- Microcystic adnexal carcinoma (syn. sclerosing/syringomatous sweat duct carcinoma) (Last Updated: 30/06/2013)
- Microscopic polyarteritis (Last Updated: 27/06/2015)
- Milia (Last Updated: 27/04/2017)
- Milker’s nodule (Last Updated: 09/08/2015)
- Mixed connective tissue disorder and overlap syndromes (Last Updated: 23/06/2015)
- Mixed tumour of the skin (syn. chondroid syringoma) (Last Updated: 30/06/2013)
- Moles (Last Updated: 19/01/2013)
- Molluscum contagiosum (Last Updated: 15/12/2016)
- Mongolian spots (Last Updated: 21/11/2014)
- Morgellon’s syndrome (Last Updated: 20/03/2017)
- Morphoea (Last Updated: 06/07/2016)
- Morton’s neuroma (Last Updated: 22/08/2014)
- Mucinoses (Last Updated: 10/11/2016)
- Mucocele (syn. mucous extravasation cyst; mucous retention cyst; ranula) (Last Updated: 21/11/2014)
- Mucosal melanocytic macules (Last Updated: 31/12/2014)
- Mucous membrane pemphigoid (syn. cicatricial pemphigoid) (Last Updated: 16/03/2015)
- Muir-Torre syndrome (Last Updated: 30/06/2013)
- Multicentric reticulohistiocytosis (Last Updated: 21/11/2014)
- Multiple minute digitate hyperkeratosis (syn. spiny hyperkeratosis) (Last Updated: 30/12/2015)
- Mycobacterial infections (Last Updated: 27/10/2016)
- Mycology (Last Updated: 19/09/2012)
- Mycosis fungoides (Last Updated: 22/08/2013)
- Myiasis (Last Updated: 09/11/2015)
- Myxoid cyst (syn. mucous cyst) (Last Updated: 01/09/2013)
N
- Naevus anaemicus (Last Updated: 23/11/2014)
- Naevus depigmentosus (syn. achromic naevus) (Last Updated: 22/06/2016)
- Naevus of Ota and Ito (Last Updated: 28/04/2017)
- Naevus sebaceous of Jadassohn (syn. sebaceous naevus; organoid naevus) (Last Updated: 30/06/2013)
- Nail disorders (Last Updated: 06/07/2016)
- Nasal glioma (Last Updated: 22/08/2014)
- Necrobiosis lipoidica (Last Updated: 15/12/2016)
- Necrolytic migratory erythema (Last Updated: 20/06/2016)
- Necrotising fasciitis (Last Updated: 04/03/2015)
- Netherton’s syndrome (Last Updated: 20/11/2015)
- Neurofibroma (Last Updated: 14/04/2013)
- Neurofibromatosis type 1 (syn. von Recklinghausen’s disease) (Last Updated: 28/04/2017)
- Neutrophilic dermatoses (Last Updated: 23/02/2015)
- Neutrophilic dermatosis of the (dorsal) hands (Last Updated: 21/01/2015)
- Nodular prurigo (syn. Hyde’s prurigo) (Last Updated: 27/05/2014)
- Nodular vasculitis (Last Updated: 27/06/2015)
- Non-bullous congenital ichthyosiform erythroderma (Last Updated: 20/11/2015)
- Notalgia paraesthetica (Last Updated: 18/01/2013)
O
- Opportunistic skin infections (Last Updated: 30/07/2015)
- Oral Allergy syndrome (Last Updated: 23/11/2014)
- Oral lesions / and other dermatological conditions of the mouth (Last Updated: 19/03/2017)
- Orf (Last Updated: 09/08/2015)
- Orofacial granulomatosis (including granulomatous cheilitis) (Last Updated: 04/08/2017)
- Oudtshoorn disease (syn. keratolytic winter erythema) (Last Updated: 26/11/2015)
P
- Pachyonychia congenita (Last Updated: 30/12/2015)
- Paget’s disease of the nipple (Last Updated: 30/06/2013)
- Pagetoid reticulosis (Last Updated: 22/08/2013)
- Palmar xanthomata (Last Updated: 23/11/2014)
- Palmoplantar keratoderma (Last Updated: 27/01/2017)
- Panniculitis (Last Updated: 06/07/2016)
- Panton-Valentine leukocidin (PVL) - associated Staphylococcus aureus (Last Updated: 23/11/2014)
- Papular dermatitis (Last Updated: 01/06/2014)
- Papular prurigo (Last Updated: 01/06/2014)
- Papular-purpuric gloves and socks syndrome (PPGSS) (Last Updated: 30/01/2014)
- Papular urticaria (Last Updated: 06/07/2016)
- Papuloerythroderma of Ofuji (Last Updated: 10/07/2015)
- Papulonecrotic tuberculid (Last Updated: 29/10/2015)
- Paraneoplastic conditions (Last Updated: 20/08/2016)
- Paraneoplastic pemphigus (Last Updated: 06/09/2015)
- Parapsoriasis (Last Updated: 05/04/2016)
- Paronychia (Last Updated: 08/11/2016)
- Pearly penile papules (Last Updated: 12/04/2015)
- Pediculosis (Last Updated: 02/07/2015)
- Peeling skin conditions (Last Updated: 06/07/2016)
- Peeling Skin syndromes (Last Updated: 26/11/2015)
- Pemphigoid gestationis (pemphigoid of pregnancy) (Last Updated: 18/01/2015)
- Pemphigus foliaceus (and its variants) (Last Updated: 06/09/2015)
- Pemphigus vulgaris and pemphigus vegetans (Last Updated: 28/04/2017)
- Perforating dermatoses (Last Updated: 29/12/2015)
- Perioral dermatitis / periocular dermatitis (syn. periorifacial dermatitis) (Last Updated: 06/07/2016)
- Periorbital hyperpigmentation (syn. dark circles; periorbital hypermelanosis) (Last Updated: 28/11/2013)
- Peripheral neuroectodermal tumours (Last Updated: 28/04/2017)
- Periungal fibromas (Last Updated: 27/08/2013)
- Perniosis (syn. chilblains) (Last Updated: 11/08/2015)
- Peutz-Jeghers syndrome (Last Updated: 15/08/2016)
- Photodermatoses: an overview (Last Updated: 06/07/2016)
- Photodermatoses: drug / chemical-induced (Last Updated: 24/04/2017)
- Phrynoderma (Last Updated: 30/12/2015)
- Phytophotodermatitis (Last Updated: 09/11/2013)
- Piebaldism (Last Updated: 28/04/2017)
- Piezogenic pedal papules (Last Updated: 24/11/2014)
- Pigmentary demarcation lines (syn. Futcher’s lines; Voigt’s lines) (Last Updated: 02/07/2016)
- Pigmented purpuric dermatoses (syn. capillaritis) (Last Updated: 27/01/2017)
- Pigmented spindle cell naevus of Reed (Last Updated: 19/01/2013)
- Pilar cyst (syn. trichilemmal cyst) (Last Updated: 08/11/2016)
- Piloleiomyoma (Last Updated: 24/04/2013)
- Pilomatricoma (syn. pilomatrixoma) (Last Updated: 30/06/2013)
- Pincer nail deformity (Last Updated: 02/05/2016)
- Pitted keratolysis (Last Updated: 11/04/2017)
- Pityriasis alba (Last Updated: 15/12/2016)
- Pityriasis amiantacea (Last Updated: 24/11/2014)
- Pityriasis lichenoides (Last Updated: 15/12/2016)
- Pityriasis rosea (Last Updated: 15/12/2016)
- Pityriasis rotunda (Last Updated: 19/08/2016)
- Pityriasis rubra pilaris (Last Updated: 28/07/2015)
- Pityriasis versicolor (Last Updated: 15/12/2016)
- Plane xanthomata (Last Updated: 08/09/2013)
- Poikiloderma of Civatte (Last Updated: 28/11/2013)
- Poikilodermatous mycoses fungoides (syn. poikiloderma atrophicans vasculare) (Last Updated: 24/11/2014)
- Polyarteritis nodosa (Last Updated: 27/06/2015)
- Polycystic Ovarian syndrome (PCOS) (Last Updated: 24/11/2014)
- Polymorphic eruption of pregnancy (syn. pruritic urticarial papules and plaques of pregnancy) (Last Updated: 15/12/2016)
- Polymorphic light eruption & juvenile spring eruption (Last Updated: 20/12/2016)
- Porokeratosis (Last Updated: 08/11/2016)
- Porphyria (Last Updated: 28/04/2017)
- Port-wine stain (syn. naevus flammeus) (Last Updated: 28/04/2017)
- Post-chikungunya pigmentation (Last Updated: 28/11/2013)
- Pregnancy related skin conditions - an overview (Last Updated: 15/12/2016)
- Pretibial myxoedema (Last Updated: 01/06/2016)
- Primary cutaneous (anaplastic) CD30+ large cell lymphoma (Last Updated: 22/08/2013)
- Primary cutaneous B-cell lymphoma (Last Updated: 22/08/2013)
- Primary cutaneous CD30+ lymphoproliferative disorders (Last Updated: 22/08/2013)
- Primary cutaneous T-cell lymphoma (Last Updated: 22/08/2013)
- Progressive macular hypomelanosis (Last Updated: 04/04/2016)
- Progressive symmetric erythrokeratoderma (Last Updated: 26/11/2015)
- Prurigo (Last Updated: 28/04/2017)
- Pruritic Urticarial Papules and Plaques of Pregnancy (syn. PUPPP) (Last Updated: 20/11/2014)
- Pruritus (without a rash) (Last Updated: 20/03/2017)
- Pruritus ani (Last Updated: 19/01/2017)
- Pseudofolliculitis (Last Updated: 24/08/2014)
- Pseudomonal nail infection (Last Updated: 02/05/2016)
- Pseudomonas folliculitis (syn. bathing suit folliculitis) (Last Updated: 27/11/2014)
- Pseudopelade of Brocq (Last Updated: 17/12/2013)
- Pseudoporphyria (Last Updated: 26/11/2014)
- Pseudoxanthoma elasticum (syn. Gronblad-Strandberg syndrome) (Last Updated: 28/04/2017)
- Psoriasis: an overview and chronic plaque psoriasis (Last Updated: 24/04/2017)
- Psoriasis: childhood psoriasis (Last Updated: 26/11/2014)
- Psoriasis: facial psoriasis (Last Updated: 26/11/2014)
- Psoriasis: flexural and genital psoriasis (Last Updated: 16/03/2017)
- Psoriasis: generalised pustular psoriasis (syn. von Zumbusch psoriasis) (Last Updated: 26/11/2014)
- Psoriasis: guttate psoriasis (Last Updated: 26/11/2014)
- Psoriasis: hyperkeratotic hand / foot psoriasis (Last Updated: 26/11/2014)
- Psoriasis: nail psoriasis (Last Updated: 26/11/2014)
- Psoriasis: palmoplantar pustulosis (Last Updated: 15/12/2016)
- Psoriasis: psoriatic arthritis (Last Updated: 24/04/2017)
- Psoriasis: scalp psoriasis (Last Updated: 24/04/2017)
- Pubic lice (syn. pediculosis pubis) (Last Updated: 02/07/2015)
- Pyoderma gangrenosum (Last Updated: 20/12/2016)
- Pyogenic granuloma (Last Updated: 20/12/2016)
R
- Ramsay-Hunt syndrome (Last Updated: 02/03/2014)
- Raynaud’s phenomenon (Last Updated: 28/04/2017)
- Reactive arthritis (syn. Reiters syndrome) (Last Updated: 05/08/2016)
- Red Scrotum syndrome (Last Updated: 12/08/2016)
- Relapsing polychondritis (Last Updated: 12/06/2016)
- Reticular erythematous mucinosis (Last Updated: 10/09/2016)
- Rheumatoid arthritis and Still’s disease (Last Updated: 27/06/2015)
- Rheumatoid nodules (Last Updated: 27/11/2014)
- Rocky Mountain spotted fever (RMSF) (Last Updated: 09/11/2015)
- Rosacea (Last Updated: 28/04/2017)
- Roseola (syn. roseola infantum, exanthema subitum) (Last Updated: 27/11/2014)
- Ross Syndrome (Last Updated: 23/02/2014)
- Rubellla (Last Updated: 30/01/2014)
S
- Salmon patch (including stork bite) (Last Updated: 27/11/2014)
- Sarcoid (Last Updated: 30/09/2015)
- Sarcoma (Last Updated: 19/09/2013)
- Scabies (Last Updated: 20/12/2016)
- Scarlet fever (syn. scarlatina) (Last Updated: 30/01/2014)
- Scars - hypertrophic and keloid (Last Updated: 27/01/2017)
- Schamberg disease (Last Updated: 17/06/2015)
- Schistosomiasis (Bilharzia) - Katayama fever (Last Updated: 09/11/2015)
- Schwannoma (syn. neurilemmoma) (Last Updated: 22/08/2014)
- Scleredema (Last Updated: 27/05/2016)
- Scleroderma (syn. morphoea) (Last Updated: 15/12/2016)
- Scleromyxoedema (Last Updated: 01/06/2016)
- Scrofuloderma (Last Updated: 29/10/2015)
- Scrotal calcinosis (Last Updated: 02/06/2016)
- Sebaceous adenoma and sebaceomas (Last Updated: 30/06/2013)
- Sebaceous carcinoma (Last Updated: 30/06/2013)
- Sebaceous gland hyperplasia (Last Updated: 27/11/2014)
- Seborrhoeic eczema (Last Updated: 20/12/2016)
- Seborrhoeic keratosis (syn. seborrhoeic wart, basal cell papilloma) (Last Updated: 20/12/2016)
- Sézary syndrome (Last Updated: 30/07/2015)
- Shagreen patch (Last Updated: 27/08/2013)
- Sister Mary Joseph’s nodule (Last Updated: 24/09/2013)
- Sjögren’s syndrome (Last Updated: 25/06/2015)
- Skin swabs (Last Updated: 19/09/2012)
- Skin tag (syn. achrochordon; fibroepithelial polyp) (Last Updated: 27/11/2014)
- Sneddon’s syndrome (Last Updated: 18/06/2015)
- Solar elastosis (syn. actinic elastosis) (Last Updated: 19/05/2016)
- Solar lentigo (Last Updated: 02/02/2017)
- Solitary circumscribed neuroma (syn. palisaded encapsulated neuroma) (Last Updated: 27/11/2014)
- South African tick typhus (or African tick-bite fever) (Last Updated: 09/11/2015)
- Speckled lentiginous naevus (syn. naevus spilus) (Last Updated: 27/11/2014)
- Spider telangiectases (syn. spider naevus) (Last Updated: 19/01/2013)
- Spiradenoma (syn. eccrine spiradenoma) (Last Updated: 30/06/2013)
- Spitz naevus (including pigmented spindle cell naevus of Reed) (Last Updated: 23/06/2015)
- Squamous cell carcinoma (Last Updated: 09/02/2017)
- Staphylococcal Scalded Skin syndrome (syn. Ritter disease; staphylococcal epidermal necrolysis) (Last Updated: 26/11/2015)
- Steatocystoma multiplex (Last Updated: 10/05/2016)
- Stevens-Johnson syndrome (Last Updated: 28/11/2014)
- Still’s disease (Last Updated: 17/05/2015)
- Strawberry naevus and other infantile haemangioma (Last Updated: 28/11/2014)
- Striae (syn. stretch marks) (Last Updated: 07/07/2016)
- Stucco keratosis (Last Updated: 28/11/2014)
- Sturge-Weber syndrome (Last Updated: 19/01/2013)
- Subacute cutaneous lupus erythematosus (Last Updated: 14/05/2015)
- Subcorneal pustular dermatosis (syn. Sneddon-Wilkinson disease) (Last Updated: 20/01/2015)
- Subungual exostosis (Last Updated: 07/05/2016)
- Subungual haematoma (Last Updated: 02/05/2016)
- Sweet’s syndrome (syn. acute febrile neutrophilic dermatosis; Gomm-Button disease) (Last Updated: 23/02/2015)
- Sycosis barbae (Last Updated: 28/11/2014)
- Syphilis (Last Updated: 30/07/2015)
- Syringocystadenoma papilliferum (Last Updated: 30/06/2013)
- Syringoma (syn. syringocystadenoma, syringocystoma) (Last Updated: 30/06/2013)
- Systemic lupus erythematosus (Last Updated: 14/05/2015)
- Systemic sclerosis (Last Updated: 02/06/2016)
T
- Talon noir (Last Updated: 28/11/2014)
- Telangiectases (Last Updated: 28/04/2017)
- Telangiectasia macularis eruptiva perstans (Last Updated: 13/05/2016)
- Telogen effluvium (Last Updated: 14/09/2013)
- Tendon xanthomata (Last Updated: 08/09/2013)
- Terry’s nails (Last Updated: 02/05/2016)
- Tinea - an overview (Last Updated: 07/07/2016)
- Tinea capitis (scalp) (Last Updated: 20/12/2016)
- Tinea corporis (body), cruris (groin) and incognito (steroid exacerbated) (Last Updated: 27/01/2017)
- Tinea faciei (face) and barbae (beard) (Last Updated: 28/04/2017)
- Tinea manuum (hands), pedis (feet), and unguium (nails) (Last Updated: 28/04/2017)
- Topical steroids (Last Updated: 17/04/2013)
- Toxic epidermal necrolysis (Last Updated: 28/11/2014)
- Trachyonychia (Last Updated: 02/05/2016)
- Traction alopecia (Last Updated: 15/12/2013)
- Travel-acquired / worldwide cutaneous infections (Last Updated: 27/01/2017)
- Trichilemmal cyst (Last Updated: 30/06/2013)
- Trichilemmoma (Last Updated: 30/06/2013)
- Trichoblastoma (Last Updated: 30/06/2013)
- Trichodiscoma (Last Updated: 30/06/2013)
- Trichoepithelioma (Last Updated: 30/06/2013)
- Trichofolliculoma (Last Updated: 30/06/2013)
- Trichotillosis (formerly called trichotillomania) (Last Updated: 15/12/2013)
- Tripe palms (syn. acanthosis palmaris, acquired pachydermatoglyphia) (Last Updated: 19/08/2016)
- Tuberculosis (Last Updated: 29/10/2015)
- Tuberous sclerosis (Last Updated: 28/04/2017)
- Tuberous xanthomata (Last Updated: 08/09/2013)
- Tumour of the follicular infundibulum (Last Updated: 30/06/2013)
- Twenty-nail dystrophy (Last Updated: 02/05/2016)
U
- Unilateral laterothoracic exanthem (syn. asymmetric periflexural exanthem of childhood) (Last Updated: 30/01/2014)
- Unilateral naevoid telangiectasia (Last Updated: 18/01/2013)
- Urticaria: acute urticaria (Last Updated: 28/11/2014)
- Urticaria: chronic physical/inducible urticaria (eg pressure, cholinergic, contact, aquagenic) (Last Updated: 30/10/2015)
- Urticaria: contact urticaria (Last Updated: 28/11/2014)
- Urticaria: solar urticaria (Last Updated: 30/10/2015)
- Urticaria: spontaneous urticaria (formerly chronic ordinary urticaria; chronic idiopathic urticaria) (Last Updated: 19/03/2017)
- Urticaria and angioedema - an overview (Last Updated: 07/07/2016)
- Urticaria pigmentosa (Last Updated: 13/05/2016)
- Urticarial vasculitis (Last Updated: 21/06/2015)
V
- Varicella (syn. chickenpox) (Last Updated: 23/02/2014)
- Varicella-zoster virus (VZV) infection (Last Updated: 02/03/2014)
- Vasculitis (Last Updated: 07/07/2016)
- Venous lake (Last Updated: 28/11/2014)
- Verrucous epidermal naevi (Last Updated: 20/11/2015)
- Verrucous keratosis (Last Updated: 10/09/2013)
- Viral exanthems (Last Updated: 07/07/2016)
- Vitiligo (Last Updated: 28/04/2017)
- Vulval intraepithelial neoplasia (VIN) and squamous cell carcinoma (Last Updated: 15/08/2016)
W
- Waardenburg’s syndrome (Last Updated: 04/07/2016)
- Waldenstrom’s hypergammaglobulinaemic purpura (Last Updated: 27/06/2015)
- Warts (Last Updated: 28/04/2017)
- Weathering nodules (Last Updated: 29/11/2014)
- Wegener’s granulomatosis (syn. granulomatosis with polyangiitis) (Last Updated: 27/06/2015)
- White patches in the mouth (Last Updated: 07/10/2013)
X
- X-linked recessive ichthyosis (Last Updated: 20/11/2015)
- Xanthelasmata (Last Updated: 08/09/2013)
- Xanthoma disseminatum (Last Updated: 01/12/2014)
- Xanthomata (Last Updated: 29/11/2014)
- Xeroderma pigmentosum (Last Updated: 28/04/2017)
Y
- Yellow Nail syndrome (Last Updated: 02/05/2016)
Z
- Zoon plasma cell balanitis (Last Updated: 11/08/2016)
- Zygomycosis (syn. Mucormycosis) (Last Updated: 22/07/2015)