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Case Report Open Access

Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report

  • Authors:
    • Mingxiang Kong
    • Li Cao
    • Qiong Zhang
    • Yong Fang
    • Chen Zhao
    • Haifeng Gu
    • Shuijun Zhang
    • Yu Chen
    • Jinhua Wu
    • Qing Bi
  • View Affiliations / Copyright

    Affiliations: Department of Orthopedics and Joint Surgery, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang 310014, P.R. China, Operating Room, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang 310014, P.R. China
    Copyright: © Kong et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 798-804
    |
    Published online on: May 27, 2015
       https://doi.org/10.3892/ol.2015.3284
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Abstract

Hereditary multiple osteochondromas (HMO) is an autosomal dominant bone disorder characterised by the presence of multiple benign cartilage‑capped tumours. Exostosin‑1 (EXT1) and EXT2 are the major morbigenous genes associated with HMO, mutations in which are responsible for 90% of all HMO cases. In patients with HMO, osteochondromas arise adjacent to the metaphysis and typically remain in the metaphyseal region of the long bones. Therefore, it is rare for osteochondromas to be identified intra‑articularly, although they may manifest as loose bodies. The present study describes a rare case of HMO manifesting as limited flexing range in the right knee joint of a 27‑year‑old male patient. Computed tomography and magnetic resonance imaging (MRI) revealed three intra‑articular osteochondromas located in the intercondylar fossa of the patient's right knee. The intra‑articular osteochondromas and protuberant extra‑articular osteochondromas around the right knee were resected, resulting in improved right knee function and no postoperative recurrence. Pathological analysis revealed that the intra‑articular osteochondromas had a thinner cartilage cap layer than the extra‑articular osteochondromas. In addition, genetic analysis of the patient and the patient's mother was conducted. From this, it was determined that a nonsense mutation, c.115G>T (p.E39X) in exon 1 of the EXT1 gene, was the cause of HMO in this case. Thus, it is proposed that osteochondromas with a pedicle within the knee, may tear and become loose intra‑articular bodies, resulting in limited joint function and thereby contributing to the progression of HMO.
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Copy and paste a formatted citation
Spandidos Publications style
Kong M, Cao L, Zhang Q, Fang Y, Zhao C, Gu H, Zhang S, Chen Y, Wu J, Bi Q, Bi Q, et al: Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report. Oncol Lett 10: 798-804, 2015.
APA
Kong, M., Cao, L., Zhang, Q., Fang, Y., Zhao, C., Gu, H. ... Bi, Q. (2015). Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report. Oncology Letters, 10, 798-804. https://doi.org/10.3892/ol.2015.3284
MLA
Kong, M., Cao, L., Zhang, Q., Fang, Y., Zhao, C., Gu, H., Zhang, S., Chen, Y., Wu, J., Bi, Q."Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report". Oncology Letters 10.2 (2015): 798-804.
Chicago
Kong, M., Cao, L., Zhang, Q., Fang, Y., Zhao, C., Gu, H., Zhang, S., Chen, Y., Wu, J., Bi, Q."Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report". Oncology Letters 10, no. 2 (2015): 798-804. https://doi.org/10.3892/ol.2015.3284
Copy and paste a formatted citation
x
Spandidos Publications style
Kong M, Cao L, Zhang Q, Fang Y, Zhao C, Gu H, Zhang S, Chen Y, Wu J, Bi Q, Bi Q, et al: Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report. Oncol Lett 10: 798-804, 2015.
APA
Kong, M., Cao, L., Zhang, Q., Fang, Y., Zhao, C., Gu, H. ... Bi, Q. (2015). Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report. Oncology Letters, 10, 798-804. https://doi.org/10.3892/ol.2015.3284
MLA
Kong, M., Cao, L., Zhang, Q., Fang, Y., Zhao, C., Gu, H., Zhang, S., Chen, Y., Wu, J., Bi, Q."Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report". Oncology Letters 10.2 (2015): 798-804.
Chicago
Kong, M., Cao, L., Zhang, Q., Fang, Y., Zhao, C., Gu, H., Zhang, S., Chen, Y., Wu, J., Bi, Q."Identification of a rare case of intra-articular osteochondroma manifesting as three loose bodies in a patient with hereditary multiple osteochondromas: A case report". Oncology Letters 10, no. 2 (2015): 798-804. https://doi.org/10.3892/ol.2015.3284
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