1. The tumor is classified into four subtypes: embryonal, botryoid, alveolar, and pleomorphic.
   其病理型多属于胚胎型或肺泡型。
2. 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、腭部是较大多形性腺瘤的好发部位,而较小的则易发生在唇、颊、龈、额、鼻唇沟部位。

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