STUDY OF INCIDENCE OF IDIOPATHIC MULTIPLE TARSAL COALITION

Abstract

A retrospective review of records, radiographs, Computerized Tomography (CT) scans, and Magnetic Resonance Imaging (MRI) scans was done from January 1994 to January 2002. Of the 35 patients in this study, 15 were females and 20 males. The mean age of the patients was 12.8 years (range, 9 to 19 years). There were 14 feet with bilateral coalition, 8 were right and 13 were left. There were 28 talo-calcaneal (all middle facets) coalitions of which 9 were bilateral. There were 20 calcaneo-navicular coalitions of which 5 were bilateral. One patient had a naviculo-cuboid coalition. The mean followup was 6.4 months (range, 1.2 to 36 months). Twenty six patients were treated conservatively with satisfactory outcome. Of the 23 patients operated 16 patients had good outcome, 5 had fair outcome, and 2 had poor outcome. Totally there were 10 out of 329 patients that had multiple tarsal coalition when we reviewed our cases and the literature. This gave an incidence of 3 percent of all the symptomatic tarsal coalition i.e. in other words the true incidence of multiple coalition is around 0.03%. This is the only study that establishes the incidence of multiple coalition.