13.10.23 Dermatology

Eczema

• • Endogenous

    • Atopic

    • Nummular / Discoid

      • Coin-shaped lesions on legs/trunk

    • Pompholyx

      • Itching vesicles on fingers

    • Stasis

      • Sites of poor venous return (ankles)

    • Seborrhoeic

  • Exogenous

    • Irritant

    • Allergic

    • Photodermatitis

  • Secondary

    • Lichen simplex

      • Lichenification from rubbing

    • Neurodermatitis

      • Generalised dryness

    • Asteatosis

      • Crazy-paving, often in older people

    • Pompholyx

    • Infection

Rash with epidermal change

• • Lichen planus

  • Lichenified eczema

  • Guttate psoriasis

  • Pityriasis lichenoides

  • Seborrhoeic dermatitis

  • Pityriasis rosea

  • Pityriasis lichenoides

  • Pityriasis versicolor

  • Desquamating stage of generalised erythema

  • Localised lesions

    • Fungal infection

    • Lupus erythematosus (systemic or discoid)

    • Fixed drug eruption

Rashes arising in the dermis

• • Erythema

    • Multiforme

    • Induratum

    • Nodosum

  • Drug reaction

  • Vasculitis

  • Urticaria

Blisters and pustules

• Widespread

  • • Chicken pox

    • Dermatitis herpetiformis

    • Erythema multiforme with blisters

    • Pityriasis lichenoides varioliformis acuta

    • Pemphigoid

    • Pemphigus

• • Localised

    • Pompholyx

    • Pustular psoriasis

    • Bullous impetigo

    • Herpes simplex

    • Herpes zoster

    • Insect bite allergy

    • Bullous drug eruption

Acne

• • Acne vulgaris

  • Acne excoree

  • Infantile acne

  • Acne conglobata

  • Occupational

  • Rosacea

Lumps and bumps

• • Seborrhoeic keratosis

  • Basal cell carcinoma

  • Squamous cell carcinoma

  • Solar keratoses

  • Rare

    • Bowen's disease

    • Paget's disease of the nipple

    • Keratoacanthoma

  • Benign tumours

    • Dermatofibroma

    • Skin tag

    • Syringoma

    • Naevus sebaceous

    • Epidermoid cyst

  • Vascular lesions

    • Port wine stain

    • Cavernous haemangioma

    • Spider naevus

    • Campbell de Morgan spots

    • Pyogenic granuloma

Black spots

• • Benign moles

    • Acquired melanocytic naevi

      • Junctional naevi

      • Compound naevi

      • Intradermal naevi

      • Blue naevus

      • Spitz naevus

      • Halo naevus

      • Becker's naevus

      • Freckles

    • Congenital pigmented naevi

    • Dysplastic naevi

  • Melanoma

    • Superficial spreading

    • Lentigo maligna

    • Nodular

    • Acral

    • Amelanocytic

Manifestations of systemic disease

• • Lupus

  • Dermatomyositis

  • Systemic sclerosis

  • Lichen sclerosis

  • Erythema multiforme

  • Stevens-Johnson syndrome

  • Erythema annulare

  • Angiomas

  • Hypopigmentation

  • Hyperpigmentation

  • Malignant conditions

    • Mycosis fungoides

    • Poikiloderma

    • Parapsoriasis

  • GI conditions

    • Vitamin deficiencies

    • Pyoderma gangrenosum

    • Dermatitis herpetiformis

    • Peutz-Jeghers

    • Crohn's

    • Porphyria cutanea tarda

  • Porphyrias

  • Xanthomas

  • Amyloid

  • Sarcoidosis

  • Pregnancy

    • Polymorphic eruptions

    • Melasma

    • Pemphigoid gestationis

Bacterial disease

• • Infected eczema

  • Impetigo

    • Bullous

    • Non-bullous

  • Boils

  • Folliculitis

  • Ecthyma

  • Erysipelas

Viral disease

• • Herpes simplex

  • Herpes zoster

  • Molluscum contagiosum

  • HPV

  • Measles

  • Rubella

  • Erythema infectiosum (fifth disease - slapped cheek)

  • Roseola infantum

  • Gianotti-Crosti syndrome

  • Hand, foot and mouth disease

Fungal and yeast infections

• • Tinea pedis (athlete's foot)

  • Tinea corporis

  • Tinea versicolor

  • Tinea capitis

  • Ringworm

  • Candida

Insects

• • Cutaneous leishmaniasis

  • Oriental sore

  • Kala-azar

  • Onchocerciasis

  • Typhus

    • Human

    • Murine

  • Rocky mountain spotted fever

  • Rickettsial pox

  • Tick typhus

  • Scrub typhus

  • Relapsing fever

  • Lyme disease

  • Yellow fever

  • Dengue

  • Scabies

  • Demodex

  • Larva migrans

  • Pediculosts