Methods:We have analysed 840 cases of congenital mental retardation with biochemistry lab tests, cytogenetic study and familyinvestigation.
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。
2
The authors also dealt with the familyinvestigation 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。
3
Conclusion:The familyinvestigation 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.