According to the 2005 National Height Standard Physical Examination Form for Children, the standard height of an 11-year-old boy is 145.3 cm. If the boy’s height is lower than this height, which is more than two standard deviations below, it is equivalent to 132.1 cm, which is clinically diagnosed as dwarfism; if it is higher than two standard deviations, it is equivalent to 158.9 cm, which is a higher state. To clarify whether a boy’s height is short or normal, the child needs to have an orthopantomogram of the wrist joint, which is a bone age test, to determine whether the child’s actual height is late or normal based on the bone age. If the child’s height is not up to the standard at the age of 11 years old and is close to the state of dwarfism, the cause of the dwarfism must be clarified and further treatment should be carried out according to the actual cause to avoid delaying the treatment by the time the height difference is too great at puberty.