Thumb MCP joint hypermobility as a complication after trapeziectomy for the thumb basal joint osteoartritis

Trapeziectomy is a common surgical intervention for thumb basal joint arthritis. While generally effective, postoperative complications such as metacarpophalangeal (MCP) joint hypermobility have been reported but not well documented.This report is aimed to describe the presentation, management, and outcomes of thumb MCP joint hypermobility following trapeziectomy in three patients.

A retrospective review of three cases of MCP joint hypermobility following trapeziectomy was conducted. Patient demographics, preoperative condition, surgical details, postoperative course, and management of MCP hypermobility were collected and analyzed.

Three female patients (mean age 62 years, range 58-67) developed MCP joint hypermobility following trapeziectomy for basal joint arthritis. Hypermobility was noted at a mean of 4 months postoperatively (range 3-6 months). All patients reported pain and instability during pinch and grip activities. Conservative management with splinting and hand therapy was initiated in all cases. Two patients showed gradual improvement after 6 months of conservative treatment. One patient required MCP joint arthrodesis at 9 months post-trapeziectomy due to persistent symptoms.

Thumb MCP joint hypermobility can occur as a complication following trapeziectomy. While conservative management may be effective in some cases, surgical intervention such as MCP arthrodesis may be necessary for refractory cases. Further research is needed to determine the incidence and risk factors for this complication.

Keywords: Trapeziectomy, MCP joint hypermobility, basal joint arthritis, postoperative complications