September 2016

Squamous cell carcinoma (SCC) in situ, also known as Bowen disease, is SCC confined to the epidermis and superficial adnexal

Basal cell carcinoma (BCC) is a carcinoma derived from basal cells of the interfollicular epidermis and/or hair follicle. BCCs exhibit

Seborrhoeic keratosis is a benign intraepidermal neoplasm that most commonly occurs in ageing skin.

Keratoacanthoma is a common, rapidly growing squamoproliferative tumour that may spontaneously regress. It is histologically indistinguishable from (and likely a

Junctional, compound, and dermal naevi are benign localized neoplastic proliferations of naevus cells (a type of melanocyte). Like all melanocytic

Lichen planus—like keratosis is a benign squamoproliferative lesion showing chronic inflammation and interface changes (likely representing active regression).

Actinic keratosis (AK) is an intraepithelial neoplastic lesion that may progress into invasive squamous cell carcinoma (SCC) or may spontaneously

Dermatofibroma (fibrous histiocytoma) is a common benign papular or nodular skin lesion composed of variable combinations of fibroblastic cells, macrophages,

Cutaneous squamous cell carcinoma (SCC) is a malignancy of epidermal keratinocytes that exhibits various degrees of differentiation that partially recapitulate