Pelvic Inlet Mesenchymal Mass Debulking via Bilateral Pubic Symphysiotomy in a ۷-year-old domestic Shorthair neutered male cat

Background: Pelvic inlet and tail base tumors are rare in cats and can cause severe clinical complications due to compression of pelvic organs such as the rectum and urethra. These lesions, commonly of mesenchymal origin, require advanced imaging and specialized surgical approaches. Bilateral pubic symphysiotomy provides an extended access to the caudal pelvic cavity, facilitating tumor debulking while maintaining pelvic and neurovascular integrity. Methods: A seven year old neutered male domestic shorthair cat presented with a firm, non compressible mass at the ventral tail base extending into the pelvis. Fine needle aspiration and hematologic evaluation suggested a mesenchymal neoplasm. Under isoflurane anesthesia, a bilateral pubic symphysiotomy was performed to achieve maximal exposure of the pelvic canal. The tumor was dissected and debulked, followed by pubic reconstruction using orthopedic stainless steel wires. Postoperative care included cefalexin, gabapentin, tramadol, and meloxicam administration, activity restriction, and removal of sutures ۱۴ days postoperatively. Results: Imaging revealed a highly vascularized subcutaneous mass (۳.۵ × ۳.۵ × ۴.۵ cm) with heterogeneous echogenicity and CT evidence of invasion into sacrocaudal musculature and adjacent vertebrae. Intraoperatively, the tumor appeared partially encapsulated with dense fibrous adhesion and areas of necrosis. Debulking was achieved successfully without major complications. The cat demonstrated uneventful immediate postoperative recovery, with apparent normal ambulation and satisfactory wound condition observed during the perioperative period. Conclusion: Bilateral pubic symphysiotomy enabled effective surgical access and tumor debulking in a complex pelvic neoplasm, preserving functional outcome and minimizing morbidity. This case underscores the importance of advanced imaging and tailored surgical planning for successful management of caudal pelvic masses in feline patients.

کلیدواژه ها:

pubic symphysiotomy ، debulking ، pelvic tumor ، cat surgery