[名词解释] 胸围(chestcircumference)

小脑扁桃体下疝是指扁桃体下端变尖呈楔形，且至少低于枕骨大孔水平以下() ["A．3mm","B．4mm","C．5mm","D．7mm","E．10mm"] 体重过重(overweight) 上臂围(armcircumference) 体重(weight) 前囟(anteriorfontanel) 胸围(chestcircumference)