Table 3. Renal neoplasms in patients with chronic uremia.

Case No.	Transplant or dialysis center	Age (years)	Sex	Underlying renal disease	Type of tumor	Mode of presentation	Relationship to transplantation	Referring physician

1	Minneapolis	45	F	Chronic glomerulonephritis	Hypernephroma of right kidney	Mass in upper pole of right kidney	Not transplanted; on hemodialysis	R. Simmons
2	San Francisco	29	M	Chronic glomerulonephritis	Renal cell carcinoma of left kidney invading capsule and perinephric fat	Incidental finding at bilateral nephrectomy	Twenty months before transplantation	F. Belzer
3	Cleveland	Not stated	Not stated	Not stated	Renal cell carcinoma involving a solitary kidney	Incidental finding at nephrectomy	Four weeks before transplantation	S. Nakamoto-
4	Edinburgh	Not stated	Not stated	Not stated	Hypernephroma of one of the kidneys	Incidental finding at bilateral nephrectomy for persistent hypertension	After transplantation	M. Woodruff
5^a	New York (Cornell)	18	M	End stage renal disease	Low grade papillary renal carcinoma of right kidney	Incidental finding when kidneys re moved	At the time of transplantation	R. Porro
6^a	Boston	34	M	Chronic glomerulonephritis	(1) Well differentiated renal cell carcinoma of left kidney; (2) two adenomas of right kidney^b	Incidental finding when kidneys removed	At the time of a second transplantation 3 months after insertion of a first homograft which never functioned	R. E. Wilson
7	Ann Arbor	43	M	End stage renal disease	Renal cell carcinoma of right kidney	Incidental finding when kidneys removed	At the time of transplantation	J. Turcotte
8	London	44	M	Hyperparathyroidism with nephrocalcinosis	Renal carcinoma of both kidneys	Incidental finding when kidneys removed	Ten months before transplantation	J. Salaman
9	Los Angeles	35	M	Malignant hypertension	Hypernephroma of a kidney	Massive retroperitoneal hemorrhage from the affected kidney	Fifteen months before transplantation	T. Berne
10	Dallas	21	M	Chronic glomerulonephritis	Renal cell carcinoma in one of his kidneys	Gross hematuria at age 18 years approximately 15 months alter immunosuppressive treatment with Imuran and prednisone was started; workup showed mass lesion in one kidney	Not transplanted; on chronic hemodialysis for approximately 3 years	P. Peters
11	Minneapolis	48	F	Chronic pyelonephritis	Adenoma of left kidney^b	Incidental finding at bilateral nephrectomy	Awaiting transplantation	R. Simmons
12	Tucson	43	M	Chronic glomerulonephritis	Adenoma of left kidney^b	Incidental finding at bilateral nephrectomy	Several weeks before transplantation	C. Zukoski

These patients are cases 8 and 28 in Table 2.

There is considerable disagreement among pathologists concerning the difference between a large renal adenoma and a small renal carcinoma. A lesion less than 2 cm in diameter is often regarded as an adenoma and a larger lesion is often regarded as a carcinoms.