Intra-articular synovial arteriovenous malformation: A case report study.

Authors

Mohammed Almuhanna, Fahad Alhamad, Mohammed Almulhim, Moayad Almaimani, Ahmed Aldraihem, Aljoharah Aljabr

Published in

Radiology case reports. Volume 21. Issue 10. Pages 4495-4501. Epub Jul 11, 2026.

Abstract

Synovial arteriovenous malformation (SAVM) of the knee is an exceedingly rare vascular anomaly, often presenting a diagnostic challenge in pediatric populations due to its nonspecific symptoms of chronic pain and recurrent swelling. We present the case of a 10-year-old boy with a 15-month history of intermittent right knee pain and difficulty bearing weight, despite normal initial radiographs. Advanced multiplanar MRI revealed an ill-defined intra-articular lesion within Hoffa's fat pad. The imaging features was not specific, and the differential diagnosis include AVM and Tenosynovial Giant Cell Tumor (TGCT). Following surgical excision, histopathological evaluation confirmed a synovial arteriovenous malformation. This case emphasizes that while SAVM mimics common conditions like juvenile idiopathic arthritis or TGCT.

PMID:
42471940
Bibliographic data and abstract were imported from PubMed on 19 Jul 2026.

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