Variations of basal cell carcinomas according to gender, age, location and histopathological subtype

This is the largest series of BCCs in the literature, and shows striking differences in anatomical distribution, sex and mean age according to histological type. The results suggest that the tumours of the trunk, and not only those of the superficial type, could represent a particular subtype of BCC. The analysis also suggests that the hypothesis of chronic vs. intermittent sun exposure cannot be simply extrapolated to BCC. Other causal factors, such as a genetic predisposition, could be involved in the development of carcinomas located on the trunk.