While testicular tumors are rare in cats, they are the most common tumor in older intact male dogs. Of these, interstitial cell tumors (ICTs) are the most common (about 50% of cases). These tumors are small and benign. About 24% are found to be seminomas, cancerous tumors that effect mostly the testicles but can affect other sites. Sertoli cell tumors (about 18% of cases) release estrogen and can cause feminization of the male dog and anemia among other signs. In rare cases, Sertoli cell tumors are malignant and can spread to the lymph nodes surrounding the urinary tract.
The best way to prevent these tumors is to neuter your dog early. Puppies as young as four months of age may be neutered as well as given their first rabies vaccine. For information on getting your dog neutered contact us at 570-247-8383, or spayneutersavenetwork@gmail.com.
For more reading on testicular tumors in dogs go to https://www.ncbi.nlm.nih.gov/pmc/articles/ PMC8980386/