Occurrence of other malignancies in patients treated for basal cell carcinoma of the skin. A cohort study.

The patient with basal cell carcinoma of the skin has sometimes been thought to run an increased risk for developing other malignancies. A retrospective cohort study of 468 cases including about 4 400 person-years of observation did not reveal a significant deviation from expected values estimated either from cancer register data or from cancer incidence in matched controls.