涎腺肿瘤占所有肿瘤的比例不足3%,其中大多数(60%～80%)为发生于腮腺的良性肿瘤。发生病变的涎腺越小,肿瘤为恶性的可能性越高。其中腮腺肿瘤中恶性肿瘤占20～25%;颌下腺恶性肿瘤比例稍高,占40%～50%;舌下腺及其它小涎腺肿瘤的恶性率则高达51%～80%。颌下腺肿瘤占涎 Salivary gland tumors accounted for less than 3% of all tumors, most of which (60% to 80%) are benign tumors that develop in the parotid gland. Smaller lesion salivary glands, the more likely the tumor is malignant. Malignant tumors in the parotid gland tumors accounted for 20 to 25%; the proportion of submandibular gland malignant tumors slightly higher, accounting for 40% to 50%; the malignant rate of the sublingual glands and other small salivary gland tumors is as high as 51% to 80%. Submandibular gland tumors accounted for salivation