Primary renal tumors in nonhuman primates.

In 17 nonhuman primates, nine females and eight males from 5 to 22 years old, there were 10 cases of renal carcinoma, four of renal adenoma, one nephroblastoma, one hamartoma and one transitional cell papillomatous hyperplasia. The most frequent clinical signs were anorexia, lethargy, weight loss, depression, and dehydration. Tumors were 0.1 to 10.0 cm in diameter. In neoplasms of tubular cell origin, papillary, tubular and solid histologic growth patterns occurred either separately or in combination. Thirty previously reported cases of primary renal tumors in nonhuman primates also were reviewed.