患者 ,女 ,8岁 ,因身体矮小就诊。自幼身材矮于同龄儿童 ,智力正常。体检 :头部无畸形 ,身高 96ｃｍ ,胸廓呈鸡胸 ,心肺未闻及异常。实验室检查 :血清钙、磷 ,肝肾功能及生长激素(ＧＨ)均在正常范围。Ｘ线检查 :后前位胸片见两肺布满砂粒状高密度阴影 ,放大镜下观察微粒边缘锐? Patient, female, 8 years old, due to short stature. Childhood younger than the same age children, mental normal. Physical examination: No deformity of the head, height 96cm, breast chest was chest, heart and lungs did not smell and abnormalities. Laboratory tests: serum calcium, phosphorus, liver and kidney function and growth hormone (GH) are in the normal range. X-ray examination: see the chest before and after two chest covered with sand-shaped high-density shadow, magnifying glass particles observed edge sharp?