Flexor Digitorum Avulsion Secondary to Enchondroma of the Distal Phalanx

Sung Hoon Moon; Chul Gie Hong; Woon Sang Lee; Jin Woo Park

doi:10.4055/jkoa.2019.54.5.447

Journal List > J Korean Orthop Assoc > v.54(5) > 1136196

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Moon, Hong, Lee, and Park: Flexor Digitorum Avulsion Secondary to Enchondroma of the Distal Phalanx

Case Report

Journal of the Korean Orthopaedic Association 2019; 54(5): 447-451.

Published online: 30 October 2019

DOI: https://doi.org/10.4055/jkoa.2019.54.5.447

Flexor Digitorum Avulsion Secondary to Enchondroma of the Distal Phalanx

Sung Hoon Moon, M.D., Chul Gie Hong, M.D., Woon Sang Lee, M.D., Jin Woo Park, M.D.

Department of Orthopedic Surgery, Kangwon National University Hospital, Chuncheon, Korea.

Correspondence to: Jin Woo Park, M.D. Department of Orthopedic Surgery, Kangwon National University Hospital, 156 Baengneyong-ro, Chuncheon 24289, Korea. TEL: +82-33-258-9224, FAX: +82-33-258-2149, kop516@gmail.com

Received 13 September 2018 Revised 30 December 2018 Accepted 10 January 2019

The Korean Orthopaedic Association

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This case report describes the unusual occurrence of a flexor digitorum profundus avulsion secondary to an enchondroma of the distal phalanx of the middle finger. The enchondroma was treated by simple curettage with an autogenous bone graft harvested from the olecranon. The avulsed bone fragment was reattached to the distal phalanx using the pull-out suture technique. Bony union and full function of the digit were achieved.

Keywords: distal phalanx, flexor digitorum profundus, enchondroma

Figures and Tables

Figure 1

Standard X-rays showing a bony fragment avulsed from an enchondroma at the base of the distal phalanx of the left middle finger. (A) Posteroanterior view. (B) Lateral view.

Figure 2

Post-contrast fat-suppressed T1-weighted magnetic resonance imagings show an expansile intramedullary lesion in the entire bone marrow of the distal phalanx with small dot-like enhancing foci. (A) Coronal view. (B) Sagittal view.

Figure 3

(A) Flexor digitorum profundus (FDP) tendon had been avulsed at its insertion. (B) After curettage and bone graft insertion, the FDP was reinserted on the grafted bone using the pull-out suture technique. (C) Immediate postoperative lateral X-ray shows the pull-out button on top of the nail plate.

Figure 4

Microscopic findings show scattered chondrocytes located in the lacunar spaces with abundant hyaline cartilage matrix. The nuclei are small, round and hyperchromatic (H&E, ×100).

Figure 5

Ten months after surgery. (A) Posteroanterior view. (B) Lateral view, showing satisfactory bony union and incorporation of bone graft. (C) Functional outcome; full flexion of the left 3rd distal interphalangeal joint is noted.

Notes

^{CONFLICTS OF INTEREST} The authors have nothing to disclose.

References

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ORCID iDs: Jin Woo Park
https://orcid.org/0000-0002-7598-1152
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