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Variation in Severity

Inherent variation of the disease process can be due to the severity of the disease.

Basal cell carcinoma, the most common skin cancer, has a number of subtypes that present along a spectrum of severity. Early, small basal cell carcinomas can look like a blemish or a tiny pimple. Advanced basal cell carcinomas can appear as an ulcerating tumor.

Basal cell carcinoma

This early, small papule of basal cell carcinoma has some tiny telangiectasias suggesting the diagnosis

This early, small papule of basal cell carcinoma has some tiny telangiectasias suggesting the diagnosis

 

Basal cell carcinomas progress over time from subtle to more obvious skin lesions

Basal cell carcinomas progress over time from subtle to more obvious skin lesions

 

This is a quite large nodular basal cell carcinoma with a classic "rolled" border

This is a quite large nodular basal cell carcinoma with a classic "rolled" border

 

This long-standing basal cell carcinoma has developed a bloody crust over a skin ulcer caused by the tumor

This long-standing basal cell carcinoma has developed a bloody crust over a skin ulcer caused by the tumor