What is your diagnosis? Abdominal fluid from a dog.

Although very few reports exist in the dog, formation of spermatocele and sperm granuloma appear to be the reported complications of vasectomy. Given the numerous extracellular and phagocytosed spermatozoa observed in the abdominal fluid, it is reasonable to conclude that spermatozoa were at least a factor (if not the primary factor) driving the inflammation and formation of peritoneal effusion in this patient. Sperm granuloma in the dog: complication of vasectomy. [Extracted from the article]