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Retroperitoneal ancient schwannoma presenting as an adrenal incidentaloma: CT and MR findings |
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| Authors: | Inokuchi Taku Takiuchi Hidekazu Moriwaki Yuji Ka Tuneyoshi Takahashi Sumio Tsutsumi Zenta Shima Hiroki Hirota Seiichi Yamamoto Tetsuya |
| Institution: | aDivision of Endocrinology and Metabolism, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan bDepartment of Urology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan cDepartment of Surgical Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan dDepartment of Urology, Nishinomiya Municipal Central Hospital, Nishinomiya, Hyogo, Japan |
| Abstract: | A 35-year-old woman was referred to our institution for additional examinations to evaluate bilateral suprarenal masses incidentally found on abdominal ultrasonographic images obtained during an annual medical health checkup. Our computed tomographic scans showed bilateral and well-circumscribed low-density suprarenal masses, while MRI revealed the tumors to be heterogeneous with low intensity on T1-weighted images and high intensity on T2-weighted images. A laparoscopic adrenalectomy was performed under the suspicion of a malignant tumor, such as a malignant fibrous histiocytoma. Pathologic findings indicated a retroperitoneal ancient schwannoma of two histologic types: Antoni A and Antoni B. We considered that elucidation of the characteristic features of a schwannoma would provide helpful preoperative information for diagnosis. |
| Keywords: | Ancient schwannoma Adrenal incidentaloma Retroperitoneum MRI CT |
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