Mallet Finger Fracture through Enchondroma of the Distal Phalanx

Abstract

A 46-year-old man injured his ring finger and developed a mallet deformity. Radiographs showed a mallet finger fracture through an osteolytic lesion of the distal phalanx. Magnetic resonance imaging showed low intensity on T1-weighted imaging and high intensity on T2-weighted imaging, which suggested the clinical diagnosis of enchondroma. The bone tumor was excised, and osteosynthesis was performed using Ishiguro's extension block pinning, and a flexion block pin was added to prevent flexor tendon avulsion fracture through the enchondroma, followed by an autologous iliac cancellous bone graft. One year after surgery, the patient had no pain or extension lag of the affected ring finger, and his quickDASH score was 0 points. Radiographs showed no recurrence and minimal arthritic change of the distal interphalangeal joint. One-stage treatment of a mallet finger fracture through an enchondroma using Ishiguro's method was effective.

Keywords

mallet finger - enchondroma - pathologic fracture - osteosynthesis

Publication History

Article published online:
02 June 2019

• References

• 1 Jacobson ME, Ruff ME. Solitary enchondroma of the phalanx. J Hand Surg Am 2011; 36 (11) 1845-1847
• 2 Tang C, Chan M, Fok M, Fung B. Current management of hand enchondroma: a review. Hand Surg 2015; 20 (01) 191-195
• 3 Shimizu K, Kotoura Y, Nishijima N, Nakamura T. Enchondroma of the distal phalanx of the hand. J Bone Joint Surg Am 1997; 79 (06) 898-900
• 4 Arthozoul M, Brun C, Laffosse JM, Martinel V, Grolleau JL, André A. Avulsion of flexor digitorum profundus secondary to enchondroma of the distal phalanx. Case report and literature review. Chir Main 2015; 34 (04) 210-214
• 5 Lu H, Chen Q, Yang H, Shen H. Enchondroma in the distal phalanx of the finger: an observational study of 34 cases in a single institution. Medicine (Baltimore) 2016; 95 (38) e4966
• 6 Ishiguro T, Itoh Y, Yabe Y, Hashizume N. Extension block with Kirschner wire for fracture dislocation of the distal interphalangeal joint. Tech Hand Up Extrem Surg 1997; 1 (02) 95-102