Archives of Orthopaedic and Trauma Surgery

, Volume 131, Issue 2, pp 211–215 | Cite as

Popliteal soft tissue tumor associated with hamstring injury

  • Yasuaki TohmaEmail author
  • Yoshiyuki Fujisawa
  • Masataka Shimaya
  • Toru Morishita
  • Yasuhito Tanaka
Orthopaedic Surgery


We report herein a very rare case of semitendinosus tear that formed a tumor in the popliteal region after not having recovered as a result of only being instructed to rest. The soft tissue tumor was discovered on ultrasonography 4 months after pain and sensation of discomfort appeared in the popliteal region. We considered this symptom as dependent on the presence of the tumor and selected surgical treatment. Intraoperatively, this soft tissue tumor was connected with the pes anserinus by tendinous tissue. On pathological examination, the soft tissue tumor was diagnosed as skeletal muscle showing necrosis. From imaging, operative findings, and pathological diagnosis, this was considered to represent a rare case in which myorrhexis developed into a soft tissue tumor in the popliteal region after a semitendinosus tear remained unhealed and was neglected over the long term. Although we had trouble confirming a diagnosis and treatment procedure, we were able to acquire good results with surgical treatment. This is, to the best of our knowledge, the first report of damaged semitendinosus becoming a soft tissue tumor in the popliteal region after long-term neglect without healing.


Hamstring Semitendinosus Muscle strain Eccentric contraction Tumor Tenotomy 



No benefits in any form have been received or will be received from any commercial party related directly or indirectly to the subject of this article.


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Yasuaki Tohma
    • 1
    Email author
  • Yoshiyuki Fujisawa
    • 2
  • Masataka Shimaya
    • 1
  • Toru Morishita
    • 1
  • Yasuhito Tanaka
    • 3
  1. 1.Department of Orthopaedic SurgeryNational Hospital Organization Nara Medical CenterNaraJapan
  2. 2.Department of Orthopaedic SurgeryNara Shin-Ohmiya Orthopaedic ClinicNaraJapan
  3. 3.Department of Orthopaedic SurgeryNara Medical UniversityKashiharaJapan

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