A Division I baseball pitcher presented with chronic forearm pain in his throwing arm while pitching. Physical examination was remarkable for point tenderness over the radial tunnel. A postexertion magnetic resonance imaging (MRI) scan revealed edema around the posterior interosseous nerve. The patient underwent decompression of the nerve along with radial tunnel release, which resulted in full resolution of symptoms and return to full baseball activities. Radial tunnel syndrome is a rare phenomenon but can occur in throwing athletes. MRI immediately after a pitching session aided in accurate diagnosis and successful surgical management.
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