Forms of BCC
Various forms are recognised:
* 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 hard 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 the carcinomas occur in sun-exposed areas and one third occur in non-sun-exposed areas, emphasizing the genetic susceptibility of the basal cell cancer patients.
Source: Wikipedia.org