前言混合瘤癌变(Carcinoma in mixed tumor)或恶性混合瘤(Malignant mixed tumor)为涎腺的恶性肿瘤,约占涎腺癌的20％左右。混合瘤癌变与恶性混合瘤是同一种肿瘤的不同名称,抑或为两种不同肿瘤的命名,认识不一,解释不尽相同,使用较紊乱。混合瘤癌变或恶性混合瘤的临床与病理学诊断尚缺乏比较统一的标准.本文就混合瘤癌变和恶性混合瘤的临床病理作一简要介绍. Introduction Carcinoma in mixed tumor or malignant tumor is a malignant tumor of the parotid gland, accounting for about 20% of parotid adenocarcinoma. Mixed tumor and malignant mixed tumors are different names of the same tumor, or the names of two different tumors. There are different understandings, different explanations, and use disorders. The clinical and pathological diagnosis of mixed-tumor cancerous or malignant mixed tumors still lacks a uniform standard. This article presents a brief introduction of the clinical pathology of mixed-tumor cancerous and malignant mixed tumors.