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KMID : 0356820150310010009
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Korean Journal of Head & Neck Oncology
2015 Volume.31 No. 1 p.9 ~ p.13
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A Case of Benign Parotid Tumor Misdiagnosed for Parotid Cancer on Preoperative Cytology
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Lee Eun-Jung
Hwang Hye-Jin
Byeon Hyung-Kwon
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Abstract
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Fine needle aspiration cytology as a diagnostic workup of parotid gland tumor is a simple and useful method. Although fine needle aspiration cytology could not predict accurate diagnosis in all cases, it is usually helpful in differentiating malignancy and benign lesions. A 35-year-old female was found to have a parotid mass for 1 year. Preoperative evaluation including computed tomography and magnetic resonance imaging were non-diagnostic, but, fine needle aspiration cytology on parotid mass showed the suspicion of a low-grade mucoepidermoid carcinoma. Superficial parotidectomy and selective neck node dissection were done based on cytology. However, final pathological examination confirmed benign pleomorphic adenoma. Here, the diagnostic accuracy and cautions in interpretation of result of fine needle aspiration cytology is discussed with respect to the case.
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KEYWORD
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Fine needle aspiration cytology, Mucoepidermoid carcinoma, Pleomorphic adenoma, False positive
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