Basal cell carcinoma classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Various forms are recognized:
- Nodular: flesh-colored papule with telangiectasis. If it ulcerates, it becomes a "rodent ulcer" (ulcus rodens), an ulcerating nodule with (often) a pearly border.
- Cystic: rarer and difficult to distinguish from the nodular form. It has a central cavity with fluid.
- Pigmented: a variant of the nodular form that may be confused with melanoma.
- Sclerosing / cicratising: a scar-like lesion.
- Superficial: a red scaling patch.
About two-thirds of basal cell carcinomas occur on sun-exposed areas of the body. One-third occur on areas of the body that are not exposed to sunlight, emphasizing the genetic susceptibility of the basal cell cancer patients.