December 10, 2023 23:47 / Last edited by dystsimetec1980 8 months ago
Background: Aromatase inhibitors (AIs) have been used in boys with idiopathic short stature (ISS) to promote growth despite the lack of actual data regarding treatment effect on adult height. In this study, we characterized adult heights and long-term follow-up in AI-treated boys with ISS. Methods: Adult heights and long-term follow-up data, including spine MRIs, of a randomized, double-blind . ->
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Objectives: We describe growth patterns and predicted adult height (PAH) in pubertal boys treated with letrozole and evaluate the potential predictors of growth responses. Methods: We performed a retrospective analysis of data from 2002 to 2020. All subjects were treated for ≥6 months and had at least 3 height measurements to calculate the growth velocity (GV) before and during treatment.
10. 5455/medarh. 2019. 73. 307-310. The inhibitory effect of aromatase on predicted adult height and near final height has been studied in patients with constitutional delay of growth and puberty (CDGP). This is the first study aimed at verifying the letrozole (Lz) effect on final height of patients with CDGP. In this study 8 patients with CDGP .
In Hero's study about near final height, in 17 boys with constitutional delay of growth and puberty, who were randomly divided into two groups and treated with testosterone-placebo and testosterone-letrozole for one year, was reported an increase of height about 6. 9 cm in the group treated with letrozole .
At treatment initiation, bone age was 13. 1 (± 1. 5) years and predicted adult height (PAH) was 163. 8 (± 9. 9) cm compared to mid-parental height of 172. 4 (± 5. 8) cm. Growth velocity decreased .
Boys treated with testosterone and placebo reached a mean near-final height of 169. 1 cm, compared with 175. 8 cm in boys treated with testosterone and letrozole.
The exclusion criteria: prepuberty, asymmetric short stature (such as achondroplasia), severe acute and chronic liver or kidney diseases, and tumors. The criteria for stopping the GH/letrozole treatment are: PAH is satisfied, and both genetic target height (THt) and growth velocity per year (< 2 cm/year) need to be considered simultaneously.
Three studies evaluating impact on growth of letrozole in children with precocious puberty were excluded (19,20,21). Open in a separate window. . Letrozole in comparable to testosterone and superior to placebo with regards to improving height outcomes in CDGP. Letrozole tended to show a better slowing effect on BA progression, when compared .
The growth potential in pubertal boys with short stature is limited by the effect of estrogen on epiphyseal fusion. This study aims to identify the efficacy and safety of the combination of growth hormone (GH) and letrozole on adult height (AH) in pubertal boys with short stature. This is a retrospective record based study. Pubertal boys with short stature who were treated with GH and .
Objectives This study was performed to investigate the effectiveness of the combination of letrozole and recombinant human growth hormone (rhGH) to improve the predicted adult height (PAH) and final adult height (FAH) of Chinese short pubertal boys. Methods In total, 171 Chinese short pubertal boys were recruited for this study. 96 of them received letrozole (2. 5 mg/d) combined with rhGH (33. 3 .
Objectives We describe growth patterns and predicted adult height (PAH) in pubertal boys treated with letrozole and evaluate the potential predictors of growth responses. Methods We performed a retrospective analysis of data from 2002 to 2020. All subjects were treated for ≥6 months and had at least 3 height measurements to calculate the growth velocity (GV) before and during treatment.
Patients were treated with Anastrozole (ANZ: 1 mg/day) or Letrozole (LTZ: 2. 5 mg/day) with/without recombinant human growth hormone (0. 05 mg/kg/day) for 1. 0 to 3. 5 years (2. 1±1. 2 years). Height gain, body mass index, lipid, liver enzyme, gonadotropins and testosterone levels were described before and at the end of treatment.
Objectives: This study was performed to investigate the effectiveness of the combination of letrozole and recombinant human growth hormone (rhGH) to improve the predicted adult height (PAH) and final adult height (FAH) of Chinese short pubertal boys. Methods: In total, 171 Chinese short pubertal boys were recruited for this study. 96 of them received letrozole (2. 5 mg/d) combined with rhGH (33 .
We present first-year data from a direct comparison of anastrozole and letrozole for height augmentation in short pubertal boys. Letrozole was more potent in hormonal manipulation than anastrozole. First-year growth velocities were comparable, but improvement in PAH was greater in the anastrozole gr ...
Models that predict potential tree heights factor in known tree growth limitations like the increasing difficulty for trees to lift water (hydraulic constraint), vulnerability to wind damage .
The constitutional delay of growth and puberty (CDGP) is the most common cause of short stature and delayed puberty in boys (1, 2). From early years of birth in particular at two years old, the stature range of patients with CDGP starts deviating from normal height growth and slowly moves under the 5 th curve for age and gender (3, 4).
Height SDS corrected for bone age was even taller because the AI groups had slower bone age progression. This growth compares favorably with an expected average net gain in height of +10. 1 cm in boys the same age with an SDS of −2. 0 cm; our subjects' height SDS was even shorter at −2. 2 to −2. 4.
This resulted in a net increase in predicted adult height of +4. 5+/-1. 2 cm in the anastrozole group at 24 months and +6. 7+/-1. 4 cm at 36 months as compared with a 1-cm gain at both time points in the placebo group. Estradiol and estrone concentrations increased less in the anastrozole group compared with placebo group.
Clinical experience with using an aromatase inhibitor to suppress estrogen production during puberty for improvement of growth potential in adolescents with short stature is limited. This report documents treatment of such a patient with a combination of growth hormone and letrozole, a third-generation aromatase inhibitor. Our case demonstrates a favorable outcome on a short-term basis.
Rats fed letrozole from day 30 to 90 , broadly encompassing pubertal growth and development, had reductions in body weight (−37. 5%), percent fat mass, crown-rump length, tibial length, and IGF-1 levels during treatment and into adulthood at day 150. Testes were enlarged relative to the reduced body weight.
The first reported use of AIs to assess their effect on height was in a group of 33 Finnish adolescent boys (mean age 15 yr) with constitutional delay of growth and puberty (CDGP) who were randomized to receive either: intramuscular depot T (1 mg/kg every 4 weeks for 6 months) and letrozole (2. 5 mg/d) for 12 months (n=11); T and placebo for 12 .
In another 2-year randomized study of 91 Iranian boys with a constitutional delay of growth and puberty, letrozole increased PAH more than placebo . . Final height after growth hormone therapy in children with idiopathic short stature and a subnormal growth velocity. Acta Pediatr 1996, 85:113-47. Article Google Scholar
Background: Aromatase inhibitors (AIs) have been used in boys with idiopathic short stature (ISS) to promote growth despite the lack of actual data regarding treatment effect on adult height. In this study, we characterized adult heights and long-term follow-up in AI-treated boys with ISS. Methods: Adult heights and long-term follow-up data, including spine MRIs, of a randomized, double-blind .
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ObjectiveTo evaluate the efficacy and safety of aromatase inhibitor letrozole in treatment of male adolescents with idiopathic short stature (ISS). MethodSeventy five boys with height less than 2 standard deviation (SD) below the mean who had entered puberty were enrolled in our study from 2004 to 2017, in the Pediatric Department of the First Affiliated Hospital, Sun Yat-Sen University.