Martínez, RenéNiklander, SvenDeichler, JavieraLeissner, OliverSeguel, HeraldoEsguep, Alfredo2022-08-262022-08-262018-03Journal of Dental Sciences Volume 13, Issue 1, Pages 75 - 79March 201819917902https://repositorio.unab.cl/xmlui/handle/ria/23639Indexación ScopusAlveolar soft-part sarcomas are clinically and morphologically distinct soft-tissue sarcomas, with an unknown histogenesis. When the tumors affect the region of the head and neck, they are often located in the orbit and tongue. We report a case of an alveolar soft-part sarcoma in the left masseter of a 28-year-old female. The patient had chronic pain and paresthesia of her left lower lip. Panoramic radiography and computed tomography showed a well-delimited radiolucent mass in the left ramus. An incisional biopsy was performed, and the sample submitted for histopathological study. The tumor showed positive periodic acid-Schiff diastase-resistant granules. Immunohistochemically, the tumor cells were diffusely positive for myoglobin, and focally positive for actin and desmin. © 2018enAlveolar Soft Part SarcomaCase ReportSarcomaArtículoCC BY-NC-ND10.1016/j.jds.2013.02.032