克兰费尔特综合征的特征为睾丸小伴细精管透明性变,精子缺乏或不育,尿中促性腺激素排泄增加,患者的身高及下肢较长,约一半男子有女性型乳房,这主要与性染色体组分为XXXY型有关。克兰费尔特综合征是由于多了一个额外的X染色体(47,XXY),儿童时期临床表现是非特定性的,因此,患者通 Cranfield’s syndrome is characterized by a small amount of testicular microscopic spermatids transparency changes, lack of sperm or infertility, increased urinary gonadotropin excretion, the patient’s height and lower extremity longer, about half of men have female breasts, This is mainly related with the sex chromosome component XXXY type. Cranfield’s syndrome is due to the extra X chromosome (47, XXY), clinical manifestations of childhood is non-specific, therefore, patients through