수술 전 세침흡인세포검사에서 악성으로 의심되었던 이하선 양성 종양 1예

A Case of Benign Parotid Tumor Misdiagnosed for Parotid Cancer on Preoperative Cytology

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-diag- nostic, but, fine needle aspiration cytology on parotid mass showed the suspicion of a low-grade mucoepider-moid 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.