Title:Cotyledonoid leiomyoma: a case report and review of the literature

Retroperitoneal sarcoma is relatively uncommon. We share our experience in encountering retroperitoneal sarcoma with vascular and urethral adhesion in a 46-year-old woman. Given the rarity of these tumors, evaluation and management should ideally be performed in a center equipped with multidisciplinary expertise in treating sarcomas.

Struma ovarii is a rare ovarian lesion characterized by the presence of thyroid tissue. The symptoms of this tumor are nonspecific and thus misdiagnosis to other lesions are common. The initial footprint of the tumor is mostly based on incidental imaging, but definitive diagnosis is possible based on pathological studies.