Veterinary Ultrasound Society

8-year-old male neutered German Shepherd Dog

Presented for pollakiuria, stranguria, and depression

Right caudal abdominal mass


  • vus_com_march_2016_rad3
    Right caudal abdominal mass
  • vus_com_march_2016_rad4
    Urinary bladder
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  • Retained testicle with malignant transformation
  • Hormone production
  • Prostatic abscess
  • Cystitis
  • Surgical removal
  • Histopathology report:
    • Sertoli cell tumor
  • Prostatic abscess was marsupialized and the dog went on to do well
  • No metastases
  • From Withrow and MacEwen Small Animal Clinical Oncology
    • Cryptochid testes have greater risk for transformation
      • Sertoli cell tumor or seminoma
    • Right testis is more commonly retained and therefore is more frequently seen in cases of tumorogenesis
    • Testicular tumors are most often diagnosed in geriatric male dogs
      • 10 years – median age
    • German shepherd, Afghan hound, Weimaraner, and Shetland sheepdog are predisposed