RESUMO
Metacarpal synostosis is an uncommon congenital hand malformation characterized by the coalescence of two or more adjacent metacarpals. Patients visit the hospital due to abduction deformity, which is usually a mild deformity or a minor functional deficit. This is one of the reasons why the patient goes to the hospital late and foregoes proper management with early detection and treatment. A number of surgical procedures ranging from simple to complex have been employed for treatment of this deformity. We describe our experience with a longitudinal osteotomy, realignment of component metacarpals with the metacarpophalangeal joint, and interposition of a non-absorbable polypropylene mesh used for inguinal hernia for correction of the abducted deformity and prevention of recurrence of synostosis while minimizing morbidity.