（武汉23日综合电）中国武汉一名男子因腰痛前往医院检查，才赫然知道体内有3颗肾脏，这样的机率仅有0.003%，医生也曝光背后的原因与隐忧。
38岁的邱姓男子长期受腰痛所苦，近期如厕时发现血尿，惊觉身体出了状况，即急忙就医。医生替邱男做了初步检查后，发现他有3颗肾脏，主要原因可能与先天胚胎发育有关，这缺陷男子不仅容易肾结石，还出现肾积水等状况。
医生进一步指出，邱男左边有两个肾，上、下位输尿管在第五关节会合，会合处下方刚好有个结石卡住。由于肾与输尿管形状畸形，肾功能会比正常人弱上许多，一旦输尿管蠕动功能异常，就会导致尿液成分沉淀机率提升，久而久之就形成所谓的结石。出现这样畸形肾脏的机率，大概仅有千分之三，算是相当少见的医学案例。
根据医学资讯，人有少见的3颗肾（单侧两颗）或4颗肾（双侧各两颗），都是身体的异常结构，即使没有症状或并发症，都需依慢性肾脏病规格来看待照护，不可大意。
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