Advanced Ultrasound in Diagnosis and Therapy (Jun 2022)

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

  • Jiaqi Zhao, MD, Weiqing Li, MD, Xiaolin Ma, MD, Rui Chen, MD, Lin Chen, MD

DOI
https://doi.org/10.37015/AUDT.2022.210010
Journal volume & issue
Vol. 6, no. 2
pp. 64 – 67

Abstract

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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.

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