Table 4.

ELL age and lengthening goal algorithm for Achondroplasia and Hypochondroplasia.

Juvenile/Adolescent	Achondroplasia	Method	Hyopchondroplasia	Method
ELL Goal	30–40 cm		15–25 cm
Age 7–11 yrs	F 5 cm + T 5 cm	4-S	±F-5 cm + T-5 cm	4-S
Age12–13 yrs	F 5–8 cm + T 5–8 cm	4-S	F 8 cm ± T 8 cm	2-S or 4-S
Age 14–15 yrs	H 10–12 cm	2-S	H 10 cm	2-S
Age 15–16 yrs	F 5–8 cm + T 5–8 cm	4-S	T 8 cm if previous F 2-S	2-S if 2-S prior

F—Femur, T—Tibia, S—Segment.