Because of the long self propagation by seeds, they have variant types.
由于长期的实生繁殖，它有许多变异类型。
Conclusions Primary lacrimal epithelial tumors show variant types and high recurrent rate. The pathological features were decisive in diagnosis, selection of treatment and the time of follow-up.
结论三种常见原发性泪腺上皮性肿瘤复发率高，了解其病理表现对肿瘤的诊断、治疗方式的选择和随访时间的确定具有参考意义。
Methods Clinical data from 4 cases of non-recurrent laryngeal nerve and related literature review was made to acknowledge its incidence, variant types and matters concerned during thyroid surgery.
方法复习4例非返性喉返神经的临床资料并结合相关文献，了解非返性喉返神经的变异类型及甲状腺手术中应注意的事项。
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