Diagnostic Difficulty in Retroperitoneal Mass: A Case Report

Abstract

Schwannoma, a benign tumor that arises from Schwann cells of the perineural nerve sheath, is often incidentally detected in imaging tests and mainly diagnosed by computed tomography (CT) scan. Treatment consists of surgical resection with clear margins. We present the case of a 49-year-old female patient subject to oncology department follow-up due to an underlying disease, left breast cancer. A large, hypermetabolic, non-cystic mass in the retroperitoneal region is identified by CT and positron emission tomography (PET)/CT scan in the left lateral aortic area. A percutaneous biopsy is requested. Due to the limited acoustic window, complete resection of the mass is decided. Final histopathology diagnosis of schwannoma. No adjuvant treatment indication undergoing favorable postoperative progress, without recurrence.