[Kirner's disease: surgical treatment].

Kirner's deformity is a rare meta-diaphysal dysplasia of the third phalanx of the fifth finger. It is usually congenital and bilateral. Its pathogenesis is not clearly understood. Very few authors have considered using a surgical treatment for this condition. The authors present a case of Kirner's deformity treated with Bonola's technique. In one finger a triangular diaphysal resection was performed. This was followed by a centromedullary pinning On the other finger an extra-osseous pin was used. The long-term results were satisfactory in both fingers. There was no difference related to the different fixation techniques.