The tumor is classified into four subtypes: embryonal, botryoid, alveolar, and pleomorphic.

其病理型多属于胚胎型型。

Conclusion The larger pleomorphic adenoma predominantly occur at the parotid,submaxillary gland or palate,while the smaller one at lip,bucca,gingiva,frons and nasolabial sulcus.

结论腮腺、颌下腺、部是较大多形性腺发部位,而较小则易发生在唇、颊、龈、额、鼻唇沟部位。