Malignant disease in renal transplant patients.

The incidence of malignant disease (renal cancer and skin cancer excluded) was analyzed in 934 renal transplant patients from one center, transplanted between 1965 and 1981, and followed through 1983. National Cancer Registry data were used for statistical comparison. Cancers of the lip, vulva, and anus and malignant lymphomas were heavily overrepresented. Other types of malignancy did not occur with increased frequency, with the exception of a possibly incidental finding of a 5-fold increase in colorectal cancer.