Primary ureteral leiomyosarcoma in a dog

Abstract

Ureteral leiomyosarcoma should be on the differential diagnosis list for a retroperitoneal mass, possibly causing severe abdominal pain with minor clinical signs associated with the urinary tract. This dog in this reported case of ureteral leiomyosarcoma had a short survival time, despite complete surgical excision and chemotherapy, because of local recurrence.

Uveal myxoid leiomyosarcoma in a horse

“…Leiomyosarcomas are common primary tumors of the urogenital tract and the gastrointestinal tract in dogs and cats and are reported occasionally at these locations in several species including horses and cattle [15][16][17][18][19]. Leiomyomas and leiomyosarcomas may develop in any organ containing smooth muscle cells including the smooth muscle cells of the iris and ciliary body.…”

Imaging features of unilateral renal T‐cell lymphoma occurring simultaneously in the urinary bladder wall and contralateral ureter with secondary polycythaemia in a dog

“…Alternative differential diagnosis for the renal mass included tumours of epithelial origin: carcinoma, adenocarcinoma and transitional cell carcinoma, and non‐epithelial neoplasms: hemangiosarcoma, fibrosarcoma and anaplastic sarcoma among others 11, 12 . Differentials for the ureter mass were transitional cell carcinoma, leiomyoma and leiomyosarcoma, mast cell tumour, spindle cell sarcoma and other sarcomas 13 . And for the bladder mass, differential diagnosis included tumours of epithelial origin like the transitional cell carcinoma, followed by squamous cell carcinoma, adenocarcinoma and undifferentiated carcinoma; as non‐epithelial origin tumours would be considered: leiomyomas and leiomyosarcomas, haemangiomas and haemangiosarcomas, fibromas and fibrosarcomas 3 …”

“…11,12 Differentials for the ureter mass were transitional cell carcinoma, leiomyoma and leiomyosarcoma, mast cell tumour, spindle cell sarcoma and other sarcomas. 13 And for the bladder mass, differential diagnosis included tumours of epithelial origin like the transitional cell carcinoma, followed by squamous cell carcinoma, adenocarcinoma and undifferentiated carcinoma; as non-epithelial origin tumours would be considered: leiomyomas and leiomyosarcomas, haemangiomas and haemangiosarcomas, fibromas and fibrosarcomas. 3…”

In this issue – March 2017

“…A second case report, this time from the UK, describes the workup of a neutered female Labrador Retriever that was presented for abdominal pain and a large soft tissue abdominal mass . She had had occasional urinary incontinence for 2 months.…”

“…A second case report, this time from the UK, describes the workup of a neutered female Labrador Retriever that was presented for abdominal pain and a large soft tissue abdominal mass. 3 She had had occasional urinary incontinence for 2 months. There are clear images of the abdominal CT, intraoperative appearance, the excised kidney and ureteric mass and the histological findings of bundles of neoplastic smooth muscle cells.…”