PS performed in skeletally immature dogs with hip dysplasia may provide an effect similar to a triple pelvic osteotomy and warrants further investigation.

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A 32-kg, 4-year-old, male neutered golden retriever. HistoryThe dog was examined at the Veterinary Medical Teaching Hospital at the University of Wisconsin because of 2month history of intermittent hematuria and bloody penile discharge. The dog had been neutered 1 month prior to clinical signs and 3 months prior to referral to the Veterinary Medical Teaching Hospital. One month prior to presentation, the referring veterinarian identified a large firm bladder on abdominal palpation and noted difficulty in advancing a needle for cystocentesis. The aspirated fluid was bloody, different from the clear urine observed during urination. The dog was treated with enrofloxacinin à (68 mg PO BID), with no improvement in clinical signs. Physical FindingsThere was a large firm mass in the caudal abdomen. The remainder of the examination was unremarkable. Radiographic FindingsA teardrop-to oval-shaped mass with a mineralized wall was present in the caudal abdomen ( Figs. 1A and 1B). A small, mineralized stalk was also noted extending from the mass caudally to the pelvic inlet. A second oval-to teardrop-shaped structure was noted dorsal and to the left of the mineralized mass, and thought to represent the urinary bladder. The radiographic diagnosis was mineralized paraprostatic cyst. Other differential diagnoses included an atypical mineralized granuloma, neoplasia, abscess, mesenteric cyst, or mineralized urinary bladder. 1,2 Ultrasonographic FindingsAn 11  7.9  8.1 cm ovoid mass with a hyperechoic nonshadowing wall and hypoechoic contents with a small amount of dependent echogenic luminal material was seen (Fig. 2). The urinary bladder was identified as a separate Fig. 1. Right lateral (A) and ventrodorsal (B) radiographs of caudal abdomen.There is a teardrop-shaped structure with a thin mineralized wall representing the paraprostatic cyst (white arrows) noted ventrally and to the right of midline. A second soft-tissue ovoid structure is present dorsal and to the left of cyst, and represents urinary bladder (black arrows).

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