8-year-old castrated male Springer Spaniel
Panting, inappetence, weight loss
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- Prostate occupies approximately 50% of the sacropubic diameter
- Prostate margins are irregular
- Amorphous mineral opacities are present within the prostatic parenchyma
- Left kidney is enlarged with loss of normal shape
- Left kidney contains linear mineral opacities roughly conforming to the shape of the renal pelvis
- Mixed bronchial, unstructured interstitial, and structured interstitial pulmonary infiltrates are present within the caudal portion of the lung included in the study.
- Presence of a prostate of moderate size and irregular margination containing amorphous mineralization in a castrated male dog
- Finding most consistent with prostatic neoplasia with primary rule outs of adenocarcinoma or transitional cell carcinoma
- Enlarged left kidney with altered shape and internal mineralization.
- DDx:
- Hydronephrosis related to obstruction at the level of the urinary trigone secondary to neoplastic invasion
- Metastasis of prostatic neoplasm
- Mixed pulmonary pattern including pulmonary nodules/masses consistent with metastasis of prostatic neoplasm
- Abdominal ultrasound examination for examination and tissue sampling of the prostate and left kidney and for evaluation of regional lymph nodes
- Thoracic radiographs to confirm suspected diagnosis of pulmonary metastasis
Candidates with the following were less successful:
- Failure to recognize that prostate size is abnormal in castrated male dog
- Failure to observe or ascribe appropriate significance to the mineral opacity in the prostate
- Failure to attempt to link left kidney abnormalities to the prostatic neoplasm. On post mortem in this animal, the left kidney was both hydronephrotic and significantly replaced by neoplastic metastasis
- Failure to adequately evaluate or attach appropriate significance to pulmonary pattern
- Failure to completely evaluate the radiographic study. Several candidates missed the primary diagnosis due to failure to evaluate the caudal abdomen in this 4-view radiographic study