title: An obstructed venous aneurysm presenting as an abdominal mass: report of a case.
abstract: We report herein the case of a 32-year-old woman found to have a venous aneurysm originating from the ovarian vein. The patient presented with a 9-cm abdominal tumor, and surgery was performed under the preoperative diagnosis of a mesenteric cyst. The tumor was easily ablated from the mesentery and resected with the right ovarian artery and vein. Histologically, the wall of the cyst showed the structure of a vein, and the diagnosis of a venous aneurysm was made. This disease is difficult to diagnose preoperatively when a patient presents with no symptoms other than a palpable mass, or when the lumen is obstructed by thrombus. This report serves to demonstrate that a venous aneurysm should be considered in the differential diagnosis of an asymptomatic abdominal mass.
authors.affiliation: Department of Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kishi
authors.forename: T
authors.initials: T
authors.lastname: Takayama
authors.forename: M
authors.initials: M
authors.lastname: Watanabe
authors.forename: M
authors.initials: M
authors.lastname: Ikeda
authors.forename: A M
authors.initials: AM
authors.lastname: Hui
authors.forename: T
authors.initials: T
authors.lastname: Motoi
authors.forename: M
authors.initials: M
authors.lastname: Makuuchi
mesh_terms: D000328:Adult; D000783:Aneurysm / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D000792:Angiography; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008639:Mesenteric Cyst / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D010053:Ovary / Q000098:blood supply*; D014057:Tomography, X-Ray Computed; D014680:Veins / Q000473:pathology / Q000601:surgery