Methods:We have analysed 840 cases of congenital mental retardation with biochemistry lab tests, cytogenetic study and family investigation.

方法：对84 0例先天性智力低下患者进行生化检查、家系分析和细胞遗传学分析。

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The authors also dealt with the family investigation which suggested the positive family history may be a valuable indication for its diagnosis.

本例还作了家系调查，认为阳性的家族史可能是白塞氏病诊断的一项有价值指标。

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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.

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。

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Dr Maguire added that the PSNI's "poor communication" with the Fenton family had "undermined the investigation and led the family to lose confidence in the police effort to find James".

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He credited the careful investigation by family and police as well as the department's recommendation.

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Dr Ahmed al-Saffar says the focus has been on the family while other lines of investigation had been dismissed.

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