A Rare Case of Canine Metastatic Spermatocytic Tumor without Sarcomatous and Anaplastic Variants

Abstract Spermatocytic tumor is a rare testicular tumor, which originated from gonocytes. It characterized by the histological feature of tripartite composed large, medium, and lymphocyte-like small cells. well-known that spematocytic benign, thus good prognosis expected after simple resection. Metastatic spermatocytic extremely usually accompanied variants including sarcomatous changes anaplastic variants. In this case, however, we report canine metastatic without prominent The mass was three kinds cells with high pleomorphism. neoplastic had an indistinct cytoplasmic border mitotic figures were frequently observed. primary metastasized to abdominal organs one month resection, dog died 13 months surgery. Thus, careful follow-up recommended surgical resection even though metastasis in tumors rare.