Arch Hand Microsurg 2018; 23(4): 262-266  
Intratendinous Fibroma with a Flexor Profundus Tendon Tear in the Finger of an Adolescent Baseball Player: A Case Report
Kyu Jin Kim1, Jae Hoon Lee2
1Department of Orthopedic Surgery, Gachon University Gil Medical Center, Incheon, Korea
2Department of Orthopaedic Surgery, Kyung Hee University Hospital at Gangdong, School of Medicine, Kyung Hee University, Seoul, Korea
Correspondence to: Jae Hoon Lee
Department of Orthopaedic Surgery, Kyung Hee University Hospital at Gangdong, 892 Dongnam-ro, Gangdong-gu, Seoul 05278, Korea
TEL: +82-2-440-6153, FAX: +82-2-440-7498, E-mail: ljhos69@naver.com
Received: August 6, 2018; Revised: September 4, 2018; Accepted: September 4, 2018; Published online: December 1, 2018.
© Korean Society for Surgery of the Hand, Korean Society for Microsurgery, and Korean Society for Surgery of the Peripheral Nerve. All rights reserved.

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
Flexor digitorum profundus (FDP) tears in adolescents appear as avulsion tears in the FDP tendon, whereas longitudinal tears are very rare. Moreover, there has been only one reported case of intratendinous fibroma occurring in the flexor tendon of a finger. A longitudinal tear of the flexor profundus tendon associated with an intratendinous fibroma has not been previously reported. We report one case of a longitudinal partial tear accompanied by an intratendinous fibroma at the FDP tendon of the left middle finger after a hyperextension injury caused by the impact of a baseball. Given the rarity of longitudinal flexor tendon tears in adolescents, in such cases, the possibility of an underlying pathology should be considered.
Keywords: Finger, Flexor digitorum profundus, Intratendinous fibroma


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