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本文用流式细胞术（ＦＣＭ）定量测定了５３例腮腺肿瘤石蜡标本的ＤＮＡ含量，结果显示，腮腺恶性肿瘤的ＤＮＡ指数（ＤＩ）高度良性肿瘤，而且其Ｓ期细胞百分数（Ｓ％）也较良性肿瘤高。以ＤＩ＝１．１４，Ｓ％＝１４％，作为判断腮腺肿瘤良恶性的界值，８７．５％的腮腺肿瘤仅用上述两个参数即可正确判定良恶性。
Flow cytometry (FCM) was used to quantify the DNA content of paraffin-embedded specimens from 53 cases of parotid gland tumors. The results showed that the DNA index (DI) of parotid malignant tumors was highly benign and the percentage of S-phase cells (S%) was also higher. Benign tumors are high. With DI = 1.14, S% = 14%, as the cut-off value for judging benign and malignant salivary gland tumors, 87.5% of parotid gland tumors can be judged as benign and malignant by using only the above two parameters.