Vascular malformations are developmental anomalies of vessels, and arteriovenous malformations are the vascular malformations with the high-flow pattern. Arteriovenous malformations are most often located in the head and neck region. The upper extremity location for arteriovenous malformations is relatively rare. A case of intramuscular, symptomatic, forearm arteriovenous malformation is reported. The 11-year-old female patient was referred with pain, and clinical examination revealed a deep mass on the volar side of the forearm. Ultrasonography revealed a high-vascularized mass which was intraoperatively identified inside the flexor digitorum superficialis muscle fibers and MRI was revealed with no connections with the neurovascular structures. The mass was safely excised inside the muscle fibers. Located both in the forearm and inside the muscle fibers show the infrequency of presented arteriovenous malformation. Surgical excision may be a reliable option for these masses because of being symptomatic and focal.
Key words: Arteriovenous malformation, forearm, intramuscular, upper extremity
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