“…In the other 25 cases a predating or concomitant extrarenal lvmphomatous involvement or the vague description of the pri mary findings argued against a truely primary renal lym phoma. The same reservation should perhaps be made in the cases of Blanc et al [15], Ulrich et al [19], Sharma et al [18], Poulios [20], Clifton and Bailey [21], and Bertoncelli et al [27], After exclusion of those cases with secondary renal involvement or insufficient data base to prove primary renal disease, there may be not more than 20 cases left with primary renal lymphoma (table 1). Freeman et al…”