[Frequency of basal cell carcinoma in a population younger than 50 years of age: clinical study and literature review].

Basal cell carcinoma is the most common type of malignant cutaneous neoplasm in humans, and it can be prevented and diagnosed early. The purpose of this study is to present clinical and microscopic findings of basal cell carcinoma in a population younger than 50 years of age. Microscopic examinations of multiple sections of skin lesion have been done, as well as a review of relevant literature.