Basal cell carcinoma, also known as basal cell epithelioma, is a tumor that occurs in the basal cell layer of the skin. It is well differentiated, slow growing and locally destructive, but rarely metastasizes. Clinical manifestations It occurs in the exposed areas of the elderly, especially on the face. The lesions are often solitary, but can also be disseminated or multiple. The following types of lesions can be clinically distinguished: nodular ulcerative, superficial, scleroderma-like or sclerosing, pigmented, and fibroepithelioma facial areas. Low-risk subtypes: nodular, superficial, and other non-invasive growth types (e.g., keratotic, follicular funnel, Pinkus fibroepithelioma) High-risk subtypes: invasive, including scleroderma-like, basal squamous, sclerosing, mixed infiltrative, or micronodular features present in any part of the tumor part of the tumor