Multiple Extensive Brachial Plexus Schwannomas

Schwannomas are typically slow-growing, benign neoplasms with peak incidence between the third and sixth decades of life. While commonly located in the head, neck, and flexor surfaces, schwannomas of the brachial plexus are rare. We present a unique case of a multifocal brachial plexus schwannoma in a 41-year-old male. A supraclavicular and infraclavicular surgical approach revealed four distinct masses that displaced rather than invaded the brachial plexus. Postoperatively, the patient experienced partial motor and sensory deficits, with gradual improvement. A routine follow-up MRI three months following the resection revealed residual schwannomas left in situ due to positive intraoperative motor response. This case highlights the unique presentation and challenges of multifocal brachial plexus schwannomas.