XYY综合征是和一般男性(核型为46,XY)相比多1条Y染色体,以高身长和攻击性行为为特征的疾病。鉴于儿童期的XYY综合征的临床特点报告甚少,现将我院2例报告如下。病历摘要:例1.男,10岁。身长150cm,体重43kg,第3胎。性格好动,课堂上不能注意听讲,于1984年5月在当地医院就诊,按轻微脑功讲能障碍综合征治疗无效,来院检查。时隔2年又来复诊。患儿1年来身长增长迅速。已达171cm,体重66kg,穿43号鞋,并伴有性格异常,表现为暴躁、主观概念强、摔砸和破坏东西,打骂人并偷窃家长和亲属的钱。表型正常,外生殖器发育正常。其父40岁,母33岁,均 XYY syndrome is a disease characterized by high-grade and aggressive behavior with one more Y chromosome than the average male (karyotype 46, XY). In view of the clinical features of childhood XYY little report, now in our hospital 2 cases are reported as follows. Medical record summary: Example 1. Male, 10 years old. Body length 150cm, weight 43kg, the third child. Good character, the class can not pay attention to listen, in May 1984 in the local hospital for treatment, according to mild brain dysfunction syndrome that can not be treated, to the hospital. A lapse of 2 years to referral again. Children grow rapidly in 1 year. Has reached 171cm, weight 66kg, wearing 43 shoes, and accompanied by abnormal personality, performance is irritable, the concept of subjective strong, smashing and destruction of things, curse and steal money from parents and relatives. Normal phenotype, external genital normal development. His father 40 years old, mother 33 years old, both