Hyperextension Malunion of the Distal Humerus - Chevron Osteotomy: A Case Report

Abstract

Treatment of hyperextension malunions of the distal humerus is done by osteotomy, several types being described in the literature. The aim of the paper is to highlight the possibility of using Chevron-type osteotomy in sagittal malunions of the distal humerus shaft. The patient presented in this case report has suffered multiple interventions after a 13C1 AO/OTA fracture of her right arm. When the malunion was identified her range of motion (ROM) was 40-90 degrees flexion. We have performed a supracondylar sagittal Chevron osteotomy at a 30 degrees angle open anteriorly. After the surgery, her ROM improved to 40-135 degrees flexion. The authors chose the Chevron osteotomy because it created an increased area (by 30%) of the interface between the two fragments and offers a good rotational stability. Unfortunately, information in the literature is limited and future studies must be done to endorse the usage of Chevron osteotomy in hyperextension malunion of the distal humerus.