Basal Cell Carcinoma of the Female Breast Masquerading as Invasive Primary Breast Carcinoma: An Uncommon Presentation Site.

Skin cancer as a single entity is the most common malignancy in North America, accounting for half of all human cancers. It comprises two types: melanoma and nonmelanoma skin cancers. Of the nonmelanomas, basal cell carcinoma (BCC) constitutes about 80% of the cancers diagnosed every year.