BCC is a slow-growing, locally invasive malignant epidermal skin tumour which mainly affects Caucasians. BCC tends to infiltrate tissues in a three-dimensional contiguous fashion through the irregular growth of sub-clinical anger-like outgrowths.
Metastasis is extremely rare, and the morbidity associated with BCC is related to local tissue invasion and destruction, particularly on the head and neck. The clinical appearances and mor- phology are diverse, including nodular, cystic, ulcerated (`rodent ulcer’), superficial, morphoeic (sclerosing), keratotic and pigmented variants.
N.R.Telfer, G.B.Colver & P.W.Bowers