本文报告二例具备五个主要特征的LMB综合征。此二例是同胞兄弟，其父毋非近亲婚配，亦无诱发损害病史，三个胞妞均发育正常。本文对国内发表的能得到的资料进行了复习，并进行了简单的讨论。 This article reports two cases of LMB syndrome with five major characteristics. The two cases are siblings, their father is not a non-relatives of marriage, did not induce damage to the history of the three Niu are normal development. This paper reviewed the available information published in China and conducted a simple discussion.