本文2例为同胞兄弟。例1系兄，于出生后第40天因呼吸困难面色发绀就诊。G1P1足月，胎动减少剖腹产，出生Apgar评分正常，喂养时有呛奶现象，家族史无特殊。入院时，双肺湿音明显，未闻及心杂音，腹较胀，四肢肌张力差，肌力约Ⅱ级，腱反射减弱。入院诊断为肺炎合并心衰、佝偻病 Two cases of this article for siblings. Example 1 Department of a brother, on the 40th day after birth due to breathing difficulties complexion cyanosis treatment. G1P1 full-term, reduced fetal movement Caesarean section, normal Apgar score at birth, choking during feeding, no family history. Admission, the lungs clearly wet lungs, no heart noise, abdominal swelling, limb muscle tension, muscle strength about grade Ⅱ, tendon reflexes. Admission diagnosis of pneumonia complicated with heart failure, rickets