Abstract
A case of rhabdomyosarcoma arising in the pterygomandibular space is reported. The patient was a 8-year-old boy who complained of swelling in the left cheek region. Panoramic radiograph examination showed an oval lesion, approximately 4 cm in diameter, with a poorly defined margin in the left ramus of the mandible. Immunohistochemically, the cytoplasm of the tumor cells was stained by desmin. Electronmicroscopic examination showeda Z-band-like structure in the cytoplasm of the tumor cells. Based on findings, the lesion was diagnosed as a rhabdomyosarcoma. The patient received multimodal therapy consisting of radiochemotherapy and surgery. There is no clinical evidence of recurrence as of 2 years and 9 months postoperatively.
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