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Alveolar soft-part sarcoma of the masseter and mandibular ramus: Report of a case and review of the literature
(Association for Dental Sciences of the Republic of China, 2018-03) Martínez, René; Niklander, Sven; Deichler, Javiera; Leissner, Oliver; Seguel, Heraldo; Esguep, Alfredo
Alveolar 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. © 2018