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多形性腺瘤(pleomorphic adenoma,PA)是唾液腺肿瘤中最常见的一种良性肿瘤,发生恶变的情况罕见。恶性PA的组织学分类由世界卫生组织于2005年定义,有3种不同的分型:(1)癌性PA(上皮恶变来源的PA);(2)肉瘤(真恶性混合肿瘤);(3)转移性PA。2015年我科诊治1例下颌骨恶性PA,属第3种分型。现报道如下。1病例资料患者男,20岁。以“左下颌骨无痛渐大性肿胀4年”为主诉于2015-03-13入院。4年前发现颏部
Pleomorphic adenoma (PA) is one of the most common benign tumors in salivary gland tumors, with malignant transformation rare. Histological classification of malignant PA was defined by the World Health Organization in 2005, there are 3 different types: (1) cancerous PA (epithelial malignant derived PA); (2) sarcoma (true and malignant mixed tumor); (3 Metastatic PA. In 2015, we diagnosed and treated one case of mandibular malignant PA, which belongs to the third type. Report as follows now. 1 case information patient male, 20 years old. To “left mandibular painless swelling 4 years ” mainly in charge of 2015-03-13 admission. 4 years ago found chin