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Isolated Compression of the Recurrent Motor Branch of the Median Nerve: A Case Report

Isolated compression of the recurrent motor branch of the median nerve is an uncommon condition encontered in the daily life of the hand surgeon. Its early identification and correction can optimize functional outcomes. Among the few causes described, there are only 2 case reports of compression by fascial bands. We present a case of isolated compression of the recurrent motor branch of the median nerve secondary to anomalous fascial bands in a 34-year-old male patient, with significant atrophy of the thenar musculature of the right hand. Electroneuromyography showed isolated involvement of abductor pollicis brevis, with no sensory changes. The patient underwent exploration and decompression, recovering opposition and thumb function in 6 months.