%A Jiaqi Zhao, MD, Weiqing Li, MD, Xiaolin Ma, MD, Rui Chen, MD, Lin Chen, MD %T Incidental Ultrasound Findings of a Giant Retroperitoneal Schwannoma: A Case Study %0 Journal Article %D 2022 %J Advanced Ultrasound in Diagnosis and Therapy %R 10.37015/AUDT.2022.210010 %P 64-67 %V 6 %N 2 %U {https://www.journaladvancedultrasound.com/CN/abstract/article_220.shtml} %8 2022-06-30 %X

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.