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Case report
Synovial sarcoma mimicking a traumatic pseudoaneurysm in the upper extremity
  1. Judy Wang1,
  2. Hong Kuan Kok2 and
  3. Iman Bayat1
  1. 1 Vascular Surgery, Northern Hospital, Epping, Victoria, Australia
  2. 2 Radiology, Northern Hospital, Epping, Victoria, Australia
  1. Correspondence to Dr Judy Wang; judymwang92{at}


Synovial sarcomas are a rare but aggressive malignancy that primarily affects young patients. Diagnosis is often difficult and delayed due to its insidious onset, heterogenous presentation and mimicry of other pathologies. We present the case of a patient with a history of a slow-growing left arm mass that arose after a traumatic fracture of the humerus. Multimodal imaging was undertaken and reported the mass as being consistent with a vascular malformation of the brachial artery. The patient underwent surgical repair of the artery and intraoperative biopsies confirmed a diagnosis of synovial sarcoma. This case highlights the importance of maintaining suspicion for soft-tissue sarcomas in young patients presenting with a mass, and demonstrates the way in which these tumours may mimic other pathologies both clinically and radiologically. Early referral to a specialist sarcoma centre is key for further investigative workup.

  • vascular surgery
  • oncology
  • radiology
  • medical education
  • surgical oncology

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  • Contributors This statement confirms that all listed authors have made a significant contribution to the conception and completion of this manuscript. JW was primarily responsible for collection and analysis of the data as well as drafting the manuscript. HKK contributed to the collection of medical images as well as drafting the manuscript. IB conceived the analysis and contributed to the manuscript draft.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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