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The Korean Journal of Pathology 2000;34(8): 601-604.
Inflammatory Myofibroblastic Tumor of the Maxillary Sinus: A case report.
Hyun Jin Son, Seung O Ko, Myoung Ja Chung, Ho Yeul Choi
1Department of Pathology, College of Medicine, Chonbuk National University, Chonju 560-180, Korea.
2Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonbuk National University, Chonju 560-180, Korea.
3Department of Oral and Maxillofacial Surgery, Institute for Medical Sciences, Chonbuk National University, Chonju 560-180, Korea.
ABSTRACT
Inflammatory myofibroblastic tumor (IMT) is a space occupying lesion which is composed of myofibroblasts, plasma cells, and lymphocytes. IMT of the maxillary sinus is rare and its etiology is unknown. We present a case of inflammatory myofibroblastic tumor occurring in the right maxillary sinus of a 57-year-old woman. Radiologically, this tumor was interpreted as malignant neoplasm. On histologic examination, bundles of spindle cells were admixed with inflammatory cells including mature plasma cells and lymphocytes. On the basis of the immunohistochemical findings and ultrastructural features, we recognized that the intervening spindle cells were myofibroblasts. We discussed etiology and prognostic factors of this tumor.
Key Words: Inflammatory myofibroblastic tumor; Maxillary sinus; Myofibroblasts