Advanced Ultrasound in Diagnosis and Therapy ›› 2022, Vol. 6 ›› Issue (2): 64-67.doi: 10.37015/AUDT.2022.210010

• Case Reports • Previous Articles     Next Articles

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

Jiaqi Zhao, MDa,1,*(), Weiqing Li, MDb,1, Xiaolin Ma, MDa, Rui Chen, MDa, Lin Chen, MDa   

  1. a Department of Ultrasound, Changzheng Hospital, Naval Medical University, Shanghai, China.
    b Department of Pathology, Changzheng Hospital, Naval Medical University, Shanghai, China
  • Received:2021-04-29 Revised:2021-06-04 Online:2022-06-30 Published:2022-06-26
  • Contact: Jiaqi Zhao, MD,


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.

Key words: Retroperitoneal neoplasm; Schwannoma; Neurilemmoma; Multimodal; Ultrasonography