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    J Korean Soc Radiol. 2012 Feb;66(2):199-202. English.
    Published online Feb 29, 2012.
    https://doi.org/10.3348/jksr.2012.66.2.199
    Copyright © 2012 The Korean Society of Radiology
    Case Report

    Postoperative Chondroid Metaplasia in First Metacarpocarpal Joint: A Case Report

    Kyung Eun Bae, MD,1 Jihae Lee, MD,1 Jae Hyung Kim, MD,1 Myeong Ja Jeong, MD,1 Soo Hyun Kim, MD,1 Mi Jin Kang, MD,1 Hyun Sun Cho, MD,1 Han Bee Lee, MD,1 Ji Eun Kwon, MD,2 and Jeong Yeon Kim, MD2
      • 1Department of Radiology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
      • 2Department of Pathology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
    • Corresponding author: Jihae Lee, MD. Department of Radiology, Sanggye Paik Hospital, Inje University College of Medicine, 1342 Dongil-ro, Nowon-gu, Seoul 139-707, Korea. Tel. 82-2-950-1187, Fax. 82-2-950-1220, Email: meritam@naver.com
    Received October 21, 2011; Accepted November 08, 2011.

    Abstract

    Intra-articular chondroid metaplasia is a rare disease; especially in the first metacarpophalangeal (MCP) joint after surgery. In this report, we present a chondroid metaplasia in the left first MCP joint as a soft tissue mass following the repair of the radial collateral ligament and ulnar collateral ligament. A hypointense signal on T2-weighted images and isointense signal on T1-weighted images without enhancement on MR and accompanied adjacent bone erosion were observed.

    Keywords
    Postoperative; Chondrometaplasia; Metacarpophalangeal Joint

    Figures

    Fig. 1
    Preoperative coventional radiograph and MR image of 22-year-old male patient.
    A. Lateral view of left thumb shows no significant abnormality.

    B. Fat-saturated sagittal T2-weighted image shows no significant bony abnormality except mild subluxation of left 1st metacarpophalangeal joint.

    Fig. 2
    Left 1st finger oblique radiograph shows extrinsic bone erosion with internal tiny calcificion (arrow) in dorsal side of 1st metacarpal head.

    Fig. 3
    Post-operative MR images 2 years after reconstruction of ulnar and radial collateral ligaments.
    A. T2-weighted axial scan shows 8 × 7 mm sized soft tissue mass (arrows) with hypointense signal in dorsal aspect of left 1st metacarpophalangeal joint.

    B, C. T1-weighted axial (B) and sagital scan (C) show intermediate signal intensity mass (arrows) located inner aspect of extensor tendon (star).

    D. T1-weighted fat saturated sagital scan with contrast enhancement shows the mass enhancement only at the peripheral portion (arrow), and most of the mass is not enhanced with contrast agent. And small bone erosion (curved arrow) is also noted at base of proximal phalanx adjacent to the mass.

    Fig. 4
    Photomicrograph (H&E, × 200) shows the cartilaginous nodule formation (*) and binucleate cells (arrows).

    References

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    MeSH Terms
    Collateral Ligaments
    Joints
    Metacarpophalangeal Joint
    Metaplasia
    Metrics
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