Today’s case is a 10-year-old male neutered Border Collie with episode of collapse, back pain, and hematuria. Where is the mass located?
Findings
The left kidney is markedly enlarged, best seen on the ventrodorsal projection. There is increased soft tissue opacity in the retroperitoneal space. The descending colon is deviated ventrally on the lateral projection and to the right of midline on the ventrodorsal projection. The liver is enlarged, extending beyond the costal arch with rounded margins. The spleen is also enlarged and rounded. The peritoneal detail is normal. No other abnormalities are noted.
Differential Diagnosis
- Left renomegly – Neoplasia, pyelonephritis, hydronephrosis with retroperitoneal effusion
- Hepatosplenomegaly – Hyperplasia, congestion, neoplasia
Diagnosis
Fibropapilloma with sarcomatous malignant transformation
- An ultrasound examination showed a cystic renal mass with heterogeneous solid components
- Splenic nodules were seen on ultrasound, splenectomy and histopathology resulted in a diagnosis of myelolipomas and extramedullary hematopoeisis
- A liver biopsy of nodules seen at surgery found nodular hyperplasia
- The mass was surgically removed. Hemangiosarcoma, nephroblastoma, and histiocytic sarcoma were ruled out by immunohistochemistry and special stains
Isn’t the intervertebral disc space in between T12 and T13 compressed?