The head girths of several patients were above the 97th percentile of the normal growth curve, but were normal in a special growth chart for achondroplasia.

• 有几位患者的头围大于正常生长曲线的第97个百分位数，可是在软骨发育不全侏儒患者特有的生长曲线中，这些头围是正常的。