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General Dermatology - Site

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Erythroderma

Erythroderma is defined as patients who are systemically unwell with a rash that covers 90% of more of their skin surface

Face and neck

Papular pustular

Non papular pustular

i) Common

ii) Uncommon / rare

  • Discoid lupus erythematosus
  • Tinea faciei (ringworm outside of the beard area)
  • Cimecosis ‘bedbugs’
  • Orofacial granulomatosis (lip and tongue)
  • Jessner’s lymphocytic infiltrate
  • Granuloma faciale
  • Lymphocytoma cutis
  • Tuberous sclerosis

Butterfly distribution

  • Rosacea
  • Facial cellulitis (syn. erysipelas)
  • Erythema infectiosum (syn. slapped cheek syndrome)
  • Systemic lupus erythematosus

Nose

Ears

Neck / upper chest

  • Dirty neck (atopic eczema)
  • Lichen simplex chronicus
  • Poikiloderma of Civatte
  • Contact allergic dermatitis
  • Acne keloidalis nuchae
  • Peudoxanthoma elasticum (rare)
  • Reticulate erythematous mucinosis (rare)

Lips

Eczematous

Infection

  • Impetigo
  • Herpes simplex

Urticarial

Chelitis

Discoloristaion

  • Lichen planus
  • Leucoplakia
  • Peutz-Jeghers (rare)
  • Addison’s disease (rare)

Others

Eyelids

Blepharits

Other

Scalp and hair

Scale

Local alopecia

i) Non-scarring

  • Alopecia areata
  • Traction
  • Trichotillomania (hair pulling)
  • Pseudopelade of Brocq

ii) Scarring

General alopecia

i) Non-scarring

  • Androgetic (male pattern) alopecia
  • Female pattern alopecia
  • Telogen & anagen effluvium
  • Alopecia totalis
  • Metabolic (iron deficiency; thyroid disease)
  • Syphilis

ii) Scarring

  • Dissecting cellulitis
  • Cicatricial pemphigoid

Hirsutism (excess hair androgenic distribution)

Hypertrichosis (excess hair non-androgenic distribution)

Trunk

Common

Uncommon

  • Darier’s disease
  • Pityriasis lichenoides
  • Urticaria pigmentosa (syn. mastocytosis)
  • Pityriasis rubra pilaris
  • Annular erythema
  • Morphoea
  • Sarcoid

Rare

  • Acute febrile neutrophilic dermatosis (Sweet’s syndrome)
  • Lymphomatoid papulosis
  • Steatocytoma multiplex
  • Syphilis
  • Macular amyloid (upper back, mainly in Asian patients)
  • Langerhans’s cell histiocytoses
  • Cutaneous T-cell lymphoma

Flexures

Common

i) Inflammatory

ii) Infection

  • Tinea
  • Candida
  • Impetigo
  • Erythrasma

iii) Other

  • Hidradenitis suppurativa
  • Acanthosis nigricans

Uncommon

  • Darier’s disease
  • Benign familial pemphigus (syn. Hailey-Hailey disease)
  • Fox-Fordyce disease
  • Extra-mammary Paget’s disease
  • Pseudoxanthoma elasticum

Limbs

General

  • Eczema
  • Nodular prurigo
  • Papular urticaria
  • Erythema multiforme

Extensor

  • Psoriasis
  • Lichen simplex chronicus
  • Keratosis pilaris
  • Granuloma annulare
  • Dermatitis herpetiformis
  • Photodermatoses (distal)
  • Lupus erythematosus
  • Dermatomyositis
  • Xanthoma

Flexural

Lower legs

Hands

Common

Uncommon / rare

  • Zoonosis
  • Hand, foot and mouth disease
  • Erythema multiforme
  • Connective tissue disease
  • Vasculitis
  • Mycobaterium marinum (fish tank granuloma)
  • Syphilis (palms)
  • Kawasaki’s disease
  • Knuckle pads

Temperature dependant

i) Cold

  • Acrocyanosis
  • Raynaud’s
  • Perniosis (chilblains)
  • Cryoglobulinaemia
  • Cryofibrinogenaemia

ii) Hot

  • Erythromelalgia

Feet

  • Dermatitis (irritant and contact allergic)
  • Psoriasis (vulgaris; hyperkeratotic; plantar pustular)
  • Keratodermas
  • Tinea
  • Warts
  • Pitted keratolysis
  • Juvenile plantar dermatosis
  • Scabies (soles affected in infants)
  • Callosites & Corns
  • Granuloma annulare (extensor)
  • Syphilis (soles - uncommon)

Nails - inclusive of benign and malignant tumours 

Colour

i) Brown, black

ii) White/Yellow

iii) Red

iv) Green

  • Pseudomonas

Shape and texture

i) Pitting

ii) Onycholysis

iii) Subungual hyperkeratoses

iv) Longitudinal dystrophy

  • Lichen planus
  • Darier’s disease (V-shaped nicks)
  • Habit tic deformity (washboard appearance)
  • Myxoid cyst

v) Other

  • Clubbing
  • Koilonychia (inherited, iron deficiency)
  • Beau’s lines (transverse white lines)
  • Median nail dystrophy (christmas tree sign)
  • Destructive - melanoma

Painful

Paronychia

  • Acute paronychia / chronic paronychia

Genital, oral and mucosal membranes - inclusive of benign and malignant tumours 

Genital

Common

i) Inflammatory

ii) Infection

iii) Other

Less common

i) Female

  • Apthous ulcers

ii) Male

  • Scrotal calcinosis
  • Zoon’s balanitis
  • Eythroplasia de Queryat

iii) Female and Male

Oral

Ulcers

  • Aphtous ulcers
  • Herpes simplex
  • Bechet’s disease
  • SCC and other malignancy
  • Phempigus and phemphigoid
  • Orofacial granulomatosis

White patches

Other

  • Angioedema
  • Chron’s disease
  • Reiter’s syndrome
  • Orofacial granulomatosis


 

 

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