Ｋｌｉｎｅｆｅｌｔｅｒ综合征２例周容１孙秀芳２例１，男，１８岁。因自幼阴茎短小，乳房增大２年入院。查体：身高１８４ｃｍ，指间距１８１ｃｍ，无胡须，喉结小，皮下脂肪较多，腋毛及阴毛稀少，乳房大，阴茎短小，睾丸小而硬。智力及社会行为正常。外周血染色体检查... 2 cases of Klinefelter syndrome Zhou Rong 1 case of Sun Xiufang 1, male, 18 years old. Because of his childhood penis short, breast enlargement 2 years admitted. Physical examination: height 184cm, finger spacing 181cm, no beard, Adam’s apple small, more subcutaneous fat, armpit hair and pubic hair sparse, large breasts, short penis, small testosterone and hard. Mental and social behavior is normal. Peripheral blood chromosome examination ...