肿瘤含有肿瘤性上皮组织与粘液样组织或软骨样组织 ,因而其组织像具有多形性或混合性 ,故名多形性腺瘤或混合瘤。对于该肿瘤的组织来源问题 ,目前尚未定论。此瘤多发生于颌面部大涎腺中 ,而原发于颌骨中却极为罕见。我科收治 1例现报道如下 :患者王×× ,男 ,34岁 ,干部 ,住院 The tumor contains a tumorous epithelial tissue and a mucinous or cartilage-like tissue, and thus its tissue is pleomorphic or mixed, hence the name polymorphic adenoma or mixed tumor. The question of the origin of the tumor’s tissue has not yet been determined. This tumor often occurs in the maxillofacial region of the maxillofacial region, but it is extremely rare in the jawbone. One case in our department was reported as follows: Patient Wang ××, male, 34 years old, cadres, hospitalized