Unilateral Talonavicular Coalition: A Case Report / 대한족부족관절학회지

Tarsal coalition is an abnormal union between two or more bones of the hind- and mid-feet, which can occur at various rates from cartilaginous to osseous union. Talonavicular coalition is reported less frequently than calcaneonavicular or talocalcaneal coalition and has been associated with various abnormalities, including symphalangism, clinodactyly, ray anomaly, clubfoot, other tarsal coalitions, and a ball-and-socket ankle joint. Patients with talonavicular coalitions are usually asymptomatic and rarely require surgical treatment. We review the literature and report on a case of 59-year-old male patient with talonavicular coalition.

El signo de la seta en la coalición talonavicular / Mushroom sign in the talonavicular coalition

Abstract: The talonavicular coalition is a rare congenital anomaly of the foot, often associated with other malformations. Unlike other coalitions, most patients are asymptomatic and do not require surgery. The authors describe two cases of patients with talonavicular coalition, one bilateral and the other unilateral associated with other malformations. The sign of the mushroom is presented as a practical way to diagnose talonavicular coalition on a standing anteroposterior radiograph, in which the contours of the bone fusion mimic the shape of a mushroom. This sign will help radiologists in the proper diagnosis of this rare coalition.

Resumen: La coalición talonavicular es una anomalía congénita poco frecuente del pie, a menudo asociada a otras malformaciones. A diferencia de otras coaliciones, la mayoría de los pacientes son asintomáticos, y no requieren cirugía. Los autores describen 2 casos de pacientes con coalición talonavicular, uno bilateral y el otro unilateral, asociados a otras malformaciones. Presentamos el signo de la seta como una práctica manera de diagnosticar la coalición talonavicular en proyección anteroposterior del pie, en el cual los contornos de la fusión ósea remedan la forma de un hongo. Este signo será de ayuda a los radiólogos para el adecuado diagnóstico de esta rara coalición.