A 12-year-old 3.4-kg (7.48-lb) vasectomized male ring-tailed lemur (Lemur catta) that appeared clinically normal and was kept at a zoological park was evaluated as part of a routine examination. The examination was performed while the lemur was under general anesthesia. On physical examination, a sperm granuloma was noted on the right testicle, which had remained unchanged since it was first identified 4 years earlier. No other abnormalities were detected on physical examination. Findings on CBC were within reference range. Serum biochemical analysis revealed mildly high alanine aminotransferase activity (which had been similarly high when measured 3 years
Dr. Engel's present address is Urologic Surgeons of Washington, 1147 20th St NW Ste 400, Washington, DC 20036. Dr. Hayhurst's present address is Mann Memorial Veterinary Clinic, PO Box 919, Kennebunk, ME 04043.
No external funding or financial support.
The authors thank Dr. Cathy Williams, Dr. Robert Schopler, and Dr. Matthew Nelson for sharing their expertise during the preparation of this report.