The carpometacarpal boss (CMCB) is painful bony prominence in the dorsum of the hand that can lead to functional and aesthetic impairment. Nonoperative methods are the management of choice, achieving good outcomes. However, operative management could be an alternative in the absence of improvement. Nevertheless, open procedures are more likely to be done, but there are complications, and it is more aggressive to the soft tissue. The use of arthroscopic techniques has increased in the last decade, being a safe alternative for CMCB management. It has the advantage of being a minimally invasive technique, allowing the early range of motion. This minimally invasive method allows synovectomy and preserves tendon attachments, achieving good functional outcomes. This case report presents an arthroscopic technique for managing the middle finger CMCB.
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