Squamous cell carcinoma of the skin in Africans.

Over a period of 12 years, 524 cases of squamous cell carcinoma were seen at the Ahmadu Bello University Hospital, Zaria, Nigeria. The common site affected was the lower limb (54%) followed by the head and neck region. Long standing chronic leg ulcer was the most common predisposing factor. Most tumours arose from post-burn scars, with no previous hospital treatment of the burns.