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Results of fine-needle aspiration cytology (FNA) in 163 patients with parotid carcinoma (a). Only 31 patients (19%) were diagnosed correctly for both histological type and grade, and 53 patients (32%) with parotid carcinoma were diagnosed as having a benign tumor or inadequate material by FNA. Results of frozen section (FS) biopsy in 117 patients with parotid carcinoma (b). A total of 57 patients (49%) were diagnosed correctly for both histological type and grade by FS
