Key result
En bloc tumor resection with vena cava excision achieves favorable recovery without ascites or edema.
Why the study?
Surgical feasibility and outcomes of en bloc resection of large intra-abdominal tumors involving the caudal vena cava with collateral circulation are not well established.
Does en bloc tumor resection including the affected vena cava segment prevent severe complications in a dog with a large intra-abdominal mass causing caudal vena cava obstruction and collateral vessel formation?
Case Report (n=1)
No
Does en bloc tumor resection including the affected vena cava segment prevent severe complications in a dog with a large intra-abdominal mass causing caudal vena cava obstruction and collateral vessel formation?
En bloc resection of an intra-abdominal tumor including the obstructed segment of the caudal vena cava is a feasible surgical option in dogs when adequate collateral circulation has developed.
Supports feasibility of en bloc vena cava resection in dogs with collaterals; leaves open validation in larger prospective cohorts.
A 14-year-and-2-month-old Toy Poodle was diagnosed with caudal vena cava obstruction associated with a large intra-abdominal mass. Two collateral vessels had developed caudal to the site of obstruction, establishing collateral circulation from the caudal region. Therefore, surgical resection of both the tumor and the obstructed segment of the caudal vena cava was performed. Intraoperatively, the large intra-abdominal mass was found to completely encase a portion of the caudal vena cava. The vena cava and the mass were carefully dissected from the cranial aspect of the left adrenal gland to the caudal aspect of the liver, and the mass was resected en bloc with a portion of the caudal vena cava. The postoperative course was favorable, with no evidence of ascites or edema. These findings suggest that even in cases where a large intra-abdominal mass causes obstruction of the caudal vena cava, en bloc resection of the tumor including the affected vena cava segment may be feasible if collateral circulation is adequately maintained through the development of collateral vessels.
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藤本 et al. (2026) conducted a case report in Intra-abdominal tumor involving the caudal vena cava (n=1). En bloc tumor resection including a portion of the caudal vena cava was evaluated on Postoperative clinical course. En bloc resection of a huge intra-abdominal tumor including the affected vena cava segment was successfully performed, leading to a favorable postoperative course with no evidence of ascites or edema.
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