Abstract
Background
Leiomyoma is a benign tumor of smooth-muscle origin. They most commonly derived from the uterus. Besides, they were also usually diagnosed in the gastrointestinal tract, skin, and mucous membranes. However, it rarely occurs in the bone.
Case presentation
The authors reported one case of 56-year-old male with intraosseous leiomyoma of the distal femur. Initially, the patient felt left knee pain for 1 year. Radiographs film disclosed an ill-defined osteolytic lesion with thinning cortex over left distal femoral medial condylar region. Computed tomography (CT) revealed homogenous radiolucent lesion with thinning cortex over the metaphysis of distal femur. Magnetic resonance imaging showed focal marrow replacement by tumor. CT-guide biopsy was performed, and the pathology showed a picture of leiomyoma. Since the definite diagnosis, the lesion was treated with en-bloc resection and endoprosthetic knee joint reconstruction. Satisfied result and disease free were achieved during follow-up.
Conclusions
Intraosseous leiomyoma of the extremities is difficult to be diagnosed due to extraordinarily rare. This rare benign tumor should be included in the differential diagnosis of any relatively intraosseous lesion with benign imaging findings. This is the first published case of primary intraosseous leiomyoma of distal femur after literature reviews.
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Acknowledgments
The report was not supported by any foundation. However, we deeply appreciate Dr. Keun-Huang Chen and Dr. Meng-Yuan Tsai for their expert reading of radiological image.
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The authors declare that there are no conflicts of interest.
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Yu-Hsiang Sung and Shan-Wei Yang contributed equally to this work.
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Sung, YH., Yang, SW., Tarng, YW. et al. Intraosseous leiomyoma of the distal femur: a case report and review of literatures. Eur J Orthop Surg Traumatol 22 (Suppl 1), 161–165 (2012). https://doi.org/10.1007/s00590-011-0874-y
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DOI: https://doi.org/10.1007/s00590-011-0874-y