所查杯状耳均无耳聋病史及其它部位畸形。 结论：杯状耳的形成是由父母双方中一方杯状耳基因决定的，家系分析显示为常染色体显性遗传。

Conclusion:The family investigation suggested that the formation of cup ear was determined by the cup ear gene of an affected parent and it was an autosomal dominant inheritance.

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一个家系中唯一的患病个体，可由上代遗传基因决定，也可由于新突变产生。参见散发。

Isolated case — an individual who is the only member of his or her kindred affected by a genetic disorder, either by chance or by new mutation. See also sporadic.

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