Kaplan’s Lesion of the Little Finger Treated with Open Reduction by a Volar Approach: A Case Report

Abstract

Kaplan’s lesions are defined as open wounds with the metacarpal head exposed in the palms, accompanied by complex dorsal dislocation of the metacarpophalangeal joint (MCPJ). Kaplan’s lesions are clinically rare because the volar side of the MCPJ is anatomically supported and reinforced by a stronger adjacent structure. Moreover, lesions in the little finger are very rarely reported because most Kaplan’s lesions occur in the index finger. The reduction of lesions and restoration of joint stability is difficult when Kaplan’s lesions occur. Various methods have been currently introduced in the treatment of Kaplan’s lesions; however, no standardized treatment has been established because of the rarity of this disease. This paper reports a case of Kaplan’s lesion of the left little finger without fracture after a fall; the case was successfully treated with open reduction using a volar approach.