Indolent growth of low‑grade myofibroblastic sarcoma of the knee with the resemblance of a benign lesion: A case report

  • Authors:
    • Tao Cheng
    • Shaohua Liang
    • Jinli Zhang
    • Wen Wang
  • View Affiliations

  • Published online on: February 19, 2024     https://doi.org/10.3892/ol.2024.14296
  • Article Number: 163
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Abstract

Low‑grade myofibroblastic sarcoma (LGMS) is a rare soft‑tissue malignant neoplasm originating from the stromal cells that is predominantly comprised of atypical myofibroblasts. The present study reports the case of a patient with low‑grade myofibroblastic sarcoma in the soft tissue of the knee. The patient exhibited a soft, painless mass on the medial side of the left knee. During surgery, a yellow‑white mass above the posterior margin of the sartorius muscle was identified. This mass, which was irregular and adherent to surrounding tissues, had a blurry boundary, indicative of invasive growth. The morphology of the mass significantly differed from conventional lipomas and was lacking typical features. Immunohistochemical staining confirmed the diagnosis of a malignant LGMS. The patient experienced no recurrence over 1 year of follow‑up and reported complete recovery of knee range of motion. The present study suggests that an incisional biopsy may be performed if LGMS is suspected based on patient symptoms and imaging results. In addition, long‑term follow‑up is crucial for the timely detection and management of any recurrence, playing a key role in the patient's ongoing care and treatment.
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April-2024
Volume 27 Issue 4

Print ISSN: 1792-1074
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Spandidos Publications style
Cheng T, Liang S, Zhang J and Wang W: Indolent growth of low‑grade myofibroblastic sarcoma of the knee with the resemblance of a benign lesion: A case report. Oncol Lett 27: 163, 2024.
APA
Cheng, T., Liang, S., Zhang, J., & Wang, W. (2024). Indolent growth of low‑grade myofibroblastic sarcoma of the knee with the resemblance of a benign lesion: A case report. Oncology Letters, 27, 163. https://doi.org/10.3892/ol.2024.14296
MLA
Cheng, T., Liang, S., Zhang, J., Wang, W."Indolent growth of low‑grade myofibroblastic sarcoma of the knee with the resemblance of a benign lesion: A case report". Oncology Letters 27.4 (2024): 163.
Chicago
Cheng, T., Liang, S., Zhang, J., Wang, W."Indolent growth of low‑grade myofibroblastic sarcoma of the knee with the resemblance of a benign lesion: A case report". Oncology Letters 27, no. 4 (2024): 163. https://doi.org/10.3892/ol.2024.14296