Deceleration in maturation of bone during adolescent age in achondroplasia—a retrospective study using RUS scoring system

Objectives Knowledge of bone age in achondroplasia is required for the prediction of adult height, timings of limb lengthening, and epiphysiodesis procedures. The purpose of this investigation was to determine the differences in skeletal age in achondroplasia and a control population with the Tanner–Whitehouse 3 method using the RUS score and to determine the right age for the interventional procedure for limb lengthening procedure or deformity correction in these patients. Materials and methods Left hand radiographs of 34 patients (age range, 5–18 years) with achondroplasia were evaluated for skeletal age using the RUS scoring system, which were compared with the left hand radiographs of 41 patients (age range, 5–18 years) without achondroplasia measuring skeletal age. The difference in chronological age and RUS bone age were evaluated statistically according to gender and age group. Results In the achondroplasia group, chronological age were 10.5 ± 4.3 years for males and 10.1 ± 3.6 years for females and RUS bone age were 9.2 ± 4.0 years for males and 8.9 ± 3.4 years for females, which showed statistically significantly difference (males p = 0.0003 and females p statistically significant difference (10 years p