Abstract
A 1.5 year old, female, spayed, Labrador retriever with a history of three abdominal surgeries within the previous two months presented to the North Carolina State University Veterinary Teaching Hospital for evaluation of a pelvic inlet mass causing fecal tenesmus, obstipation, and dysuria. Abdominal ultrasound revealed a caudal abdominal mass extending into the pelvic cavity. Cytologic evaluation of the mass showed a pleomorphic round to fusiform cell population with histiocytic and suppurative inflammation. The primary differential was neoplasia, but inflammation with cellular pleomorphism could not be excluded. Via histopathology and immunohistochemistry, a diagnosis of poorly differentiated sarcoma originating from the uterus or cervix with widespread intra-abdominal dissemination and metastasis was made. Sarcomas of any type are rare in young dogs with only sporadic cases of poorly or undifferentiated sarcomas reported. This case is a unique presentation of an aggressive, poorly differentiated sarcoma arising from the cervix or uterus in a young dog and illustrates the importance of histologic evaluation of surgically resected tissues that are abnormal in appearance.
Highlights
Sarcomas are rare in young dogs with few reported cases of poorly differentiated sarcomas
This paper describes a young dog with an aggressive, pleomorphic, poorly differentiated sarcoma, with widespread intra-abdominal dissemination and multiorgan metastasis
A 1.5 year old female spayed Labrador retriever presented for evaluation of a pelvic inlet mass causing fecal tenesmus, obstipation, and dysuria
Summary
Sarcomas are rare in young dogs with few reported cases of poorly differentiated sarcomas. A 1.5 year old female spayed Labrador retriever presented for evaluation of a pelvic inlet mass causing fecal tenesmus, obstipation, and dysuria. Two months prior, she had presented to the referring veterinarian for bloody vaginal discharge. Serosanguinous vulvar discharge, dysuria, and tenesmus continued and a ventral colon mass was still palpable. On day 7, abdominal radiographs revealed a markedly impacted colon, and an enema was done under anesthesia. During a second exploratory laparotomy, a large, hard fecolith was removed from the colon. Her clinical signs continued postoperatively and referral to the North Carolina State University, Veterinary Teaching Hospital (NCSU-VTH) was recommended.
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