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Solitary myofibroma of the mandible: an immunohistochemical and ultrastructural study with a review of the literature

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Abstract

A solitary myofibroma (MF) is an unusual spindle cell neoplasm that usually arises in the soft tissue, skin, or bone of the head and neck region in infancy. We report an extremely rare case of MF of the mandible in an 18-year-old Japanese woman together with the conventional histologic, immunohistochemical, and electron microscopic findings. The tumor was well circumscribed and composed of fibroblast-like or myofibroblast-like spindle cells. On immunohistochemical evaluation the tumor cells were positive for vimentin, α-smooth muscle actin, HHF-35, and calponin, but negative for neurogenic antigens and markers for vascular endothelial cells. The Ki-67 labeling index was 10 % and the p53 labeling index was 10 %. Ultrastructural examination revealed smooth muscle cell differentiation. The patient was treated by surgical resection and underwent follow-up without any signs of recurrence. MF presents a wide range of differential diagnosis, including benign and malignant neoplasms. Therefore, accurate diagnosis may avoid an unnecessarily aggressive therapy.

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Acknowledgments

The authors would like to thank Assistant Professor Dr. Atsuji Matsuyama and Chief Professor Dr. Masanori Hisaoka, Department of Pathology and Oncology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan, for providing histological information. The authors are grateful to Associate Professor Edward Barroga of the Department of International Medical Communications of Tokyo Medical University for the editorial review of the English manuscript.

Conflict of interest

None declared.

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Authors and Affiliations

  1. Department of Oral and Maxillofacial Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan

    Takafumi Satomi, Michihide Kohno, Ai Enomoto, Harutsugu Abukawa, Ko Fujikawa, Toshiyuki Koizumi & Daichi Chikazu

  2. Department of Anatomic Pathology, Tokyo Medical University, Tokyo, Japan

    Jun Matsubayashi & Toshitaka Nagao

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  1. Takafumi Satomi
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  2. Michihide Kohno
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  3. Ai Enomoto
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  4. Harutsugu Abukawa
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  9. Toshitaka Nagao
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Correspondence to Takafumi Satomi.

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Satomi, T., Kohno, M., Enomoto, A. et al. Solitary myofibroma of the mandible: an immunohistochemical and ultrastructural study with a review of the literature. Med Mol Morphol 47, 176–183 (2014). https://doi.org/10.1007/s00795-013-0062-8

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  • DOI: https://doi.org/10.1007/s00795-013-0062-8

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