最常见的的原发恶性肿瘤是鳞状细胞癌，其次是起源于唾液腺的腺样囊腺癌。

The most common primary malignant tumor is squamous cell carcinoma, with the second most common being adenoid cystic carcinoma arising from the salivary glands.

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结果：浆液性囊腺瘤凋亡率为10 %以下，浆液性囊腺癌凋亡率为38% ，凋亡细胞呈灶状分布，无规律性。

Results:Apoptosis rate of serous cystadenoma was less 10% and that of serous cystadenocarcinoma was 38%, cells of programmed death were distributed as plaques, irregularly.

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