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  • Title: Skeletal age in idiopathic short stature: An analytical study by the TW3 method, Greulich and Pyle method.
    Author: Kim HJ, Song HR, Shyam A, Heon SS, Unnikrishnan R, Song SY.
    Journal: Indian J Orthop; 2010 Jul; 44(3):322-6. PubMed ID: 20697487.
    Abstract:
    BACKGROUND: The skeletal age in short stature and in various other growth abnormalities is well documented. We lack the study pertaining to the analysis of the skeletal age in idiopathic short stature or analyzing the difference in skeletal age delay or advancement between the familial short stature (FSS) and non-familial short stature (non-FSS) groups, hence this study. Present retrospective study is designed to study the variation in patterns of skeletal age in ISS. MATERIALS AND METHODS: One hundred and eighty six patients, 95 males and 91 females of idiopathic short stature were examined to assess the skeletal age deviation in relation to chronological age. The radiographs of the left hand and wrist were done. The skeletal age was assessed using Tanner and Whitehouse (TW3) method and Greulich and Pyle (GP) atlas. The patients were divided into two groups based on the parental heights. Group A (Familial Short Stature; FSS) with 100 patients (55 males, 45 females) included patients whose at least one parent was short and Group B (non-Familial Short Stature; non-FSS) with 86 patients (40 males, 46 females), included patients whose parental height was normal. The carpal scores, RUS (Radius, Ulna and Short bone) scores and GP age were determined and the respective delay or advances were calculated. RESULTS: The skeletal age in Group A was delayed relative to chronological age by a mean of 1.9 years in males and 2.3 years in females (P<0.05) by RUS method, mean of 2.7 years in males and 2.6 years in females by Carpal score (P<0.05), 2.2 years in males and 2.7 years in females by GP atlas age (P<0.05). The skeletal age in Group B was advanced by a mean of 0.9 years in males and 1.4 years in females (P<0.05) by RUS method, mean of 0.4 years in males and 0.35 years in females by Carpal score (P<0.05), mean of 1.1 years in males and 0.2 years in females by GP atlas method (P<0.05). The Pearson's coefficient of correlation (P<.001) demonstrated good agreement association between all three scores. CONCLUSIONS: There is definite age delay in both males and females in the FSS group while the bone maturation is accelerated in the non-FSS group. Both RUS and GP show good correlation amongst both the genders in both the groups and there is good inter observer correlation for both the methods. We can hypothesize that while treatment protocols to accelerate bone age will be beneficial in the FSS group, these should be avoided in the non-FSS group. Our study also indicates that there definitely exists a difference in normal growth curves in both these groups and a detailed study is required to plot their respective normal growth lines so as to make proper adjustments in the assessment of the remaining growth and limb lengthening protocols.
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