Incidental Ultrasound Findings of a Giant Retroperitoneal Schwannoma: A Case Study

• Published in: Advanced ultrasound in diagnosis and therapy 2022-06, Vol.6 (2), p.64-67
• Main Authors: Jiaqi, Zhao, MD, Weiqing, Li, MD, Xiaolin, Ma, MD, Rui, Chen, MD, Lin, Chen, MD
• Format: Article
• Language: English
• Subjects: retroperitoneal neoplasm|schwannoma|neurilemmoma|multimodal|ultrasonography
• ISSN: 2576-2516
• DOI: 10.37015/AUDT.2022.210010

Schwannoma in retroperitoneal region is quite rare. In this report, we presented such a rare case of a large size schwannoma in a 23-year-old man admitted with a complaint of mild pain in his right lower abdomen. The abdominal ultrasonography detected a round-shaped heterogeneous hypoechoic mass with a few blood flow signals at the retroperitoneal area inferior to the right kidney. The contrast-enhanced ultrasound demonstrated a well-demarcated hypoechoic mass with minor vascularization. Computed tomography (CT) diagnosed the retroperitoneal mass as a malignant neoplasm. After surgical resection, histopathologic examination revealed that the mass was a benign cellular schwannoma. Besides the rare case of schwannoma in retroperitoneal region, we believe that multimodal sonographic patterns are conducive to the preoperative diagnosis of retroperitoneal neurilemmoma.