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Aggressive Intraosseous Myofibroma of the Maxilla: Report of a Rare Case and Literature Review

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Abstract

Myofibroma (MF) is a benign mesenchymal myofibroblast-derived tumor, which occurs most frequently in children, and rarely affects the maxilla. We reported a case of an aggressive intraosseous lesion found in the maxilla of a 9-year-old female child. Intraorally, the swelling extended from tooth 12 to 16, causing displacement of teeth 13, 14, and 15. Computed tomography revealed a large osteolytic lesion causing thinning and cortical erosion. Microscopically, the lesion showed a proliferation of spindle-shaped cells, with elongated nuclei and eosinophilic cytoplasm, arranged in interlaced fascicles. The immunohistochemical analysis revealed cytoplasmic positivity for α-SMA and HHF-35, and negativity for desmin, laminin, S-100, β-catenin, and CD34. Ki-67 was positive in 8% of tumor cells. The diagnosis was MF. Herein, we describe an additional case of central MF arising in the maxilla, including clinical, imaging, microscopical, and immunohistochemical features, as well as a review of the literature.

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Correspondence to Ricardo Luiz Cavalcanti de Albuquerque-Júnior.

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Cunha, J.L.S., Rodrigues-Fernandes, C.I., Soares, C.D. et al. Aggressive Intraosseous Myofibroma of the Maxilla: Report of a Rare Case and Literature Review. Head and Neck Pathol 15, 303–310 (2021). https://doi.org/10.1007/s12105-020-01162-y

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