[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [General pathology](https://durgical.com/en/general-pathology/) › Skin # Skin Inflammatory and blistering dermatoses, infections, pigmented lesions and skin tumours. 23 pages ## Lesion - [**Acne vulgaris and rosacea** Acne starts in blocked oil glands in teenagers](https://durgical.com/en/general-pathology/acne-vulgaris-and-rosacea/) - [**Actinic keratosis and squamous cell carcinoma** Rough sun spots are early, precancerous changes](https://durgical.com/en/general-pathology/actinic-keratosis-and-squamous-cell-carcinoma/) - [**Adnexal tumours of the skin** Tumours of hair follicles and sweat or oil glands are usually benign](https://durgical.com/en/general-pathology/adnexal-tumours-of-the-skin/) - [**Basal cell carcinoma** The commonest cancer of all](https://durgical.com/en/general-pathology/basal-cell-carcinoma/) - [**Benign epidermal growths** Many common skin bumps are harmless growths of the epidermis](https://durgical.com/en/general-pathology/benign-epidermal-growths/) - [**Bullous pemphigoid and dermatitis herpetiformis** Bullous pemphigoid causes large tense blisters in older people](https://durgical.com/en/general-pathology/bullous-pemphigoid-and-dermatitis-herpetiformis/) - [**Dermatofibroma vs dermatofibrosarcoma protuberans** Dermatofibroma is a common harmless firm bump](https://durgical.com/en/general-pathology/dermatofibroma-vs-dermatofibrosarcoma-protuberans/) - [**Eczematous dermatitis** Eczema is itchy, red, oozing skin that becomes thick and scaly when it lasts](https://durgical.com/en/general-pathology/eczematous-dermatitis/) - [**Epidermolysis bullosa and porphyria** Some blisters come from inherited weak skin proteins or from light-sensitive pigments, not from…](https://durgical.com/en/general-pathology/epidermolysis-bullosa-and-porphyria/) - [**Erythema multiforme, Stevens–Johnson syndrome and TEN** Target spots after a herpes flare are usually erythema multiforme](https://durgical.com/en/general-pathology/erythema-multiforme-stevens-johnson-syndrome-and-ten/) - [**Freckles, lentigines and melanocytic nevi** Freckles and sun spots are pigment changes; moles are benign clusters of pigment cells](https://durgical.com/en/general-pathology/freckles-lentigines-and-melanocytic-nevi/) - [**Ichthyosis** In ichthyosis the skin sheds poorly and builds up thick, fish-like scales](https://durgical.com/en/general-pathology/ichthyosis/) - [**Lichen planus and interface dermatitis** Lichen planus causes itchy, flat, purple bumps and white lacy patches in the mouth](https://durgical.com/en/general-pathology/lichen-planus-and-interface-dermatitis/) - [**Melanoma: subtypes, Breslow and markers** Melanoma is diagnosed under the microscope, and its thickness in millimetres is the single most…](https://durgical.com/en/general-pathology/melanoma-subtypes-breslow-and-markers/) - [**Merkel cell carcinoma** A rare, aggressive skin cancer of neuroendocrine cells, often caused by a virus](https://durgical.com/en/general-pathology/merkel-cell-carcinoma/) - [**Mycosis fungoides, Sézary syndrome and mastocytosis** Some blood-borne cells settle in the skin and can grow there as a tumour: T lymphocytes in…](https://durgical.com/en/general-pathology/mycosis-fungoides-sezary-syndrome-and-mastocytosis/) - [**Panniculitis** Panniculitis is inflammation of the fat under the skin](https://durgical.com/en/general-pathology/panniculitis/) - [**Pemphigus** In pemphigus, antibodies cut the glue between skin cells](https://durgical.com/en/general-pathology/pemphigus/) - [**Psoriasis and seborrheic dermatitis** Psoriasis is a lifelong immune disease with thick silvery plaques on elbows, knees and scalp](https://durgical.com/en/general-pathology/psoriasis-and-seborrheic-dermatitis/) - [**Skin infections: the biopsy** Common skin infections by viruses, bacteria and fungi each leave a recognisable mark in the skin…](https://durgical.com/en/general-pathology/skin-infections-the-biopsy/) - [**Urticaria and angioedema** Hives are itchy wheals that come and go within hours](https://durgical.com/en/general-pathology/urticaria-and-angioedema/) ## Mechanism - [**Melanoma: pathogenesis** Melanoma is the most dangerous skin cancer](https://durgical.com/en/general-pathology/melanoma-pathogenesis/) ## Topic - [**Skin pathology: terms and reaction patterns** Skin is a living barrier with its own immune cells](https://durgical.com/en/general-pathology/skin-pathology-terms-and-reaction-patterns/) ## A to Z - [A](https://durgical.com/en/general-pathology/a-z/a/) - [B](https://durgical.com/en/general-pathology/a-z/b/) - [C](https://durgical.com/en/general-pathology/a-z/c/) - [D](https://durgical.com/en/general-pathology/a-z/d/) - [E](https://durgical.com/en/general-pathology/a-z/e/) - [F](https://durgical.com/en/general-pathology/a-z/f/) - [G](https://durgical.com/en/general-pathology/a-z/g/) - [H](https://durgical.com/en/general-pathology/a-z/h/) - [I](https://durgical.com/en/general-pathology/a-z/i/) - [J](https://durgical.com/en/general-pathology/a-z/j/) - [K](https://durgical.com/en/general-pathology/a-z/k/) - [L](https://durgical.com/en/general-pathology/a-z/l/) - [M](https://durgical.com/en/general-pathology/a-z/m/) - [N](https://durgical.com/en/general-pathology/a-z/n/) - [O](https://durgical.com/en/general-pathology/a-z/o/) - [P](https://durgical.com/en/general-pathology/a-z/p/) - [R](https://durgical.com/en/general-pathology/a-z/r/) - [S](https://durgical.com/en/general-pathology/a-z/s/) - [T](https://durgical.com/en/general-pathology/a-z/t/) - [U](https://durgical.com/en/general-pathology/a-z/u/) - [V](https://durgical.com/en/general-pathology/a-z/v/) - [W](https://durgical.com/en/general-pathology/a-z/w/) [← General pathology](https://durgical.com/en/general-pathology/) Educational content on the mechanisms of disease; not a diagnostic or treatment guide and no substitute for a health professional's advice. 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