Retroperitoneal soft tissue sarcoma, a rare mimic and important differential of iliopsoas abscess

Authors

  • Ryan J. Green Department of Radiology, Cairns Base Hospital, Queensland, Australia
  • Sarath Vennam Department of Radiology, Royal Cornwall Hospital, UK
  • Corey Kirkham Department of Radiology, Cairns Base Hospital, Queensland, Australia
  • Conor Aylward Department of Radiology, Cairns Base Hospital, Queensland, Australia
  • William Caufield Department of Radiology, Cairns Base Hospital, Queensland, Australia
  • Lucy Andraloj Department of Radiology, Royal Cornwall Hospital, UK
  • Miles Geldart Department of Radiology, Royal Cornwall Hospital, UK
  • James Sellars Department of Radiology, Cairns Base Hospital, Queensland, Australia

DOI:

https://doi.org/10.18203/2349-2902.isj20241956

Keywords:

STS, Iliopsoas abscess, Interventional radiology

Abstract

This case report highlights the diagnostic challenges posed by retroperitoneal soft tissue sarcoma (STS) presenting as an iliopsoas abscess, mimicking common symptoms and radiological findings. This patients’ symptoms recurred despite multiple percutaneous drains and revisions over a period of months. Further investigation revealed a partly solid, partly cystic mass consistent with sarcoma. Surgical excision confirmed the diagnosis, but recurrence necessitated palliation. This case emphasizes the importance of differential diagnoses of iliopsoas collection and the need for research into alternative imaging modalities to aid clinicians and radiologists in differentiating benign retroperitoneal collections from malignancy.

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Published

2024-07-09

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Section

Case Reports