Abstract
Extra-abdominal tumors rarely occur in the oral cavity. A case of extraabdominaldesmoid tumor of the maxilla is reported. A 70-year-old woman presented with gingiva swelling of the left upper molar, region. The swelling had been growing rapidly. Radiographs showed resorption of the upper alveolar bone. We suspected a malignant tumor of the maxilla. Partial resection of the left maxilla was performed with the patient under general anesthesia. There has been no evidence of recurrence or metastasis as of about 2 years 2 months after the operation. Histopathologically, the tumor consisted mainly of well differentiated fibroblasts with abundant collagen between the tumor cells. The cells showed no atypia or abnormal mitosis, and oppressively invaded the neighboring osseous tissue. The final diagnosis was extra-abdominal desmoid tumor.
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