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Targeted Muscle Reinnervation for Treatment of Postresection Interdigital Neuroma: A Cadaveric Feasibility Study. | LitMetric

Background: Symptomatic postresection interdigital neuroma is a frustrating problem that causes debilitating foot pain. Implementing the concepts of targeted muscle innervation, this study offers a novel nerve transfer involving the resected third common plantar digital nerve (CPDN) to the motor nerve branch of the third dorsal interosseous muscle (DIMB) to improve postresection pain.

Methods: Ten fresh feet from seven cadaveric donors were used for this study. CPDN and DIMB lengths and diameters were measured, along with nerve overlap after the transfer with ankle in neutral position and in maximal dorsiflexion. Motor entry point to the calcaneal tuberosity and to the fifth metatarsal tuberosity were measured and used to evaluate the ratio relative to foot length. Means, standard deviations, and P values were calculated for each measure and between sexes and feet (right and left).

Results: In all specimens, the nerve transfer was technically feasible, without notable size mismatch between the donor and recipient nerves. CPDN, DIMB, and important anatomical reference points were identifiable in all specimens. Average CPDN length was 30.1 ± 8.2 mm. The average DIMB length was 14.4 ± 3.9 mm. The overlap between the donor and recipient in neutral ankle position at the transfer site was 6.4 ± 1.8 mm.

Conclusions: Given their anatomical locations, a nerve transfer between the third CPDN and third DIMB is surgically feasible. This novel technique is a viable option that can be used instead of the conventional technique of muscle implantation or more proximal re-resection for symptomatic postresection interdigital neuroma.

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http://dx.doi.org/10.1097/PRS.0000000000009785DOI Listing

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