Skin
Inflammatory and blistering dermatoses, infections, pigmented lesions and skin tumours.
23 pages
Lesion
- Acne vulgaris and rosaceaAcne starts in blocked oil glands in teenagers
- Actinic keratosis and squamous cell carcinomaRough sun spots are early, precancerous changes
- Adnexal tumours of the skinTumours of hair follicles and sweat or oil glands are usually benign
- Basal cell carcinomaThe commonest cancer of all
- Benign epidermal growthsMany common skin bumps are harmless growths of the epidermis
- Bullous pemphigoid and dermatitis herpetiformisBullous pemphigoid causes large tense blisters in older people
- Dermatofibroma vs dermatofibrosarcoma protuberansDermatofibroma is a common harmless firm bump
- Eczematous dermatitisEczema is itchy, red, oozing skin that becomes thick and scaly when it lasts
- Epidermolysis bullosa and porphyriaSome blisters come from inherited weak skin proteins or from light-sensitive pigments, not from…
- Erythema multiforme, Stevens–Johnson syndrome and TENTarget spots after a herpes flare are usually erythema multiforme
- Freckles, lentigines and melanocytic neviFreckles and sun spots are pigment changes; moles are benign clusters of pigment cells
- IchthyosisIn ichthyosis the skin sheds poorly and builds up thick, fish-like scales
- Lichen planus and interface dermatitisLichen planus causes itchy, flat, purple bumps and white lacy patches in the mouth
- Melanoma: subtypes, Breslow and markersMelanoma is diagnosed under the microscope, and its thickness in millimetres is the single most…
- Merkel cell carcinomaA rare, aggressive skin cancer of neuroendocrine cells, often caused by a virus
- Mycosis fungoides, Sézary syndrome and mastocytosisSome blood-borne cells settle in the skin and can grow there as a tumour: T lymphocytes in…
- PanniculitisPanniculitis is inflammation of the fat under the skin
- PemphigusIn pemphigus, antibodies cut the glue between skin cells
- Psoriasis and seborrheic dermatitisPsoriasis is a lifelong immune disease with thick silvery plaques on elbows, knees and scalp
- Skin infections: the biopsyCommon skin infections by viruses, bacteria and fungi each leave a recognisable mark in the skin…
- Urticaria and angioedemaHives are itchy wheals that come and go within hours
Mechanism
Topic
A to Z
Educational content on the mechanisms of disease; not a diagnostic or treatment guide and no substitute for a health professional's advice. No doses are given.
Representative model, for educational purposes only.