Carcinoidal tumor of the kidney.

Two cases of primary renal carcinoidal tumor are reported. One was discovered in a 32-year-old pregnant woman. The other tumor was retrospectively diagnosed 3 years after nephrectomy in a 65-year-old woman who was hospitalized with a metastatic lesion in her lumbar spine. Both tumors are compared with 5 other cases previously reported in the literature, and hypotheses about the cause of renal localization of this tumor are reviewed.