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Ann Pediatr Endocrinol Metab > Volume 7(2); 2002 > Article
Reassessment of Growth Hormone(GH) Status and Metabolic Disturbance in Young Adults with Childhood-onset GH Deficiency.
Duk Hee Kim, Eun Gyong Yoo
Abstract
PURPOSE
Adults with GH deficiency(GHD) have abnormal body composition, reduced physical performance, altered lipid metabolism, increased cardiovascular diseases, and reduced quality of life. Administration of GH to these patients reduce clinical abnormalities to normal ranges. Therefore, patients with childhood-onset GHD might need to continue GH replacement after the attainment of final height. Recently studies have shown that a high proportion of patients with childhood-onset GHD are no longer GHD when retested at young adult. METHODS: GH secretion was reevaluated with insulin and clonidine after completion of GH treatment in 29 young adult patients(21.3+/-2.8 yrs, 17 men, 12 women) with childhood-onset GHD diagnosed at a mean age of 11.4+/-3.5 yr. The mean duration of GH treatment was 3.7+/-3.0 yrs. Eleven(11 men) with idiopathic patients presented in 2(18%) isolated GHD and 9(82%) in multiple pituitary hormonal deficiencies. Eighteen(6 men, 12 women) with organic patients presented in 4(22%) isolated GHD and 14(88%) in multiple pituitary hormomal deficiencies, which was caused from craniopharyngioma, germinoma & other lesions. Blood sampling were done as usual method for checking LH, FSH and TSH concentration after injection of gonadotropin releasing hormone & thyrotropin releasing hormone. Serum cortisol levels were also checked after insulin injection and all hormonal concentrations were measured with radioimmunoassay method. Total cholesterol, high density lipoprotein (HDL)-cholesterol, low density lipoprotein(LDL)-cholesterol concentrations were measured by standard techniques. Bone density was measured in the level of lumbar spine and femur with DEXA. M-mode, two-dimensional and pulsed Doppler echocardiographic studies were performed. Quality of life was assessed from Beck depression inventory questionnaire with age-matched control.
RESULTS
All patients with idiopathic and organic GHD were confirmed as GHD through combined pituitary function retesting at young adult. The additional pituitary hormonal deficiencies were increased in numbers. Their total cholesterol and triglyceride levels were increased especially in patients with organic GHD. There were no specific abnormal findings in echocardiographic findings compared to normal reference. Bone density with DEXA showed osteopenia(T score <-1) was found in 20/24(83%) and osteoporosis(T score <-2.5) in 8/24(33%) in young adult GHD. Quality of life was evaluated with BDI questionnaire and showed mild depression in 32% and moderate to severe depression in 11%.
CONCLUSION
82% of patients with idiopathic and 88% of organic GHD have additional pituitary hormonal deficiencies in childhood, showing multiple pituitary hormonal deficiencies rather than isolated GHD and has GHD permanently in all young adults with idiopathic and organic GHD and that is a little different findings from other foreign reports and needs to follow up in future.
Keywords: Retesting;Growth hormone deficiency;Idiopathic growth hormone deficiency;Organic growth hormonal deficiency


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