在婴儿对肌炎与先天性肌营养不良的区别的重要性,在医学文献中没有较多的讨论价值。这种区别在小儿并非总是容易的,但因为肌炎是能够治疗的,因此识别受累婴儿是很重要的。本文报告3例肌炎患儿,均足月妊娠,正常分娩。例1出生后5分钟无呼吸给插管抢救,12天时发现其张力低,哭声弱,吸吮力差。6个月检查有张力低,反射消失,CPK The importance of the distinction between myositis and congenital muscular dystrophy in infancy has not been much discussed in the medical literature. This difference is not always easy in children, but because myositis is treatable, it is important to identify infants. This article reports 3 cases of myositis in children, both full-term pregnancy, normal childbirth. Example 1 5 minutes after birth, no breathing catheter to rescue, 12 days and found that the low tension, crying weak, poor sucking. 6 months to check for low tension, reflection disappeared, CPK