Abstract
Identification of the site of origin and qualitative diagnosis of giant tumors occupying the pelvic cavity is difficult. We report a case of a giant leiomyoma originating from the pelvic retroperitoneum. The patient was a 26-year-old woman who was examined by a local doctor for complaints of nausea and diarrhea. A pelvic mass was identified on abdominal ultrasound, and she was referred to our hospital. A giant mass occupying the pelvic cavity was revealed by various imaging modalities ; however, no infiltration of the surrounding tissue was identified. Findings on the cranial and caudal sides of the tumor differed. Aggressive angiomyxoma was suspected preoperatively, and surgery was performed to remove the pelvic tumor, which was attached only to the retroperitoneal pelvic floor. The site was dissected and a giant tumor—25.5 cm in diameter—was removed. The results of histopathological and immunohistological tests led to a diagnosis of leiomyoma with myxoid degeneration. Herein, we present this case together with a review of the literature.
