Bone mineral density (BMD) was evaluated by dual energy x ray absorptiometry in 60 adults (33 males, 27 females; aged 50, range 23-76 years) who were growth hormone deficient from various causes for 10-4 (1-31) years. Adult patients who had acquired growth hormone deficiency before completion of puberty had significantly reduced mean (SEM) BMD compared with age matched healthy controls at the lumbar spine: 0-87 (0.09) v 1-20 (0.03) g/cm2, femoral neck: 0-81 (0-06) v 1-08 (0.04) g/cm2, and Ward's triangle: 0-68 (0.07) v 1-04 (0.05) g/cm2. These values were also reduced compared with those of patients who had received human growth hormone during puberty. Untreated growth hormone deficiency when present during puberty results in reduced adult bone density.
OBJECTIVE: To investigate whether osteoporosis occurs after surgical treatment for obesity. DESIGN: A cross-sectional study of ®ve groups of subjects who had undergone surgical treatment for obesity: ®ve premenopausal women; 13 post-menopausal women; seven post-menopausal women taking oestrogen replacement (HRT); ®ve men; and six women who had undergone surgical reversal (mean time 7 y). SUBJECTS: Thirty-six Caucasian subjects who had undergone jejunoileal or pancreaticobiliary bypass surgery at St George's Hospital between 1971 and 1992. Their mean age was 50.8 y (range 32 ± 69 y) and the median time since the operation was 14.8 y (range 4 ± 23 y). MEASUREMENTS: A clinical questionnaire was used to exclude possible factors, which might in¯uence bone mineral density. A single blood sample was collected for measurement of calcium, phosphate, alkaline phosphatase, albumin, magnesium, zinc, creatinine, thyroxine, 25-hydroxy-vitamin D, sex steroids, gonadotrophins and IGF-1 and 24 h urine calcium excretion was measured. Bone mineral density (BMD) was measured in the lumbar (L2-L4) spine (LS) and femoral neck (FN) by dual energy X-ray absorptiometry (DEXA). RESULTS: There was no difference in serum calcium, alkaline phosphatase, IGF-1, 25-hydroxy-vitamin D (25-OH vitamin D), magnesium or zinc concentrations between the ®ve groups. The LS-BMD T score was lower (P`0.05) in male subjects ( 7 2.08 AE 1.04 mean 1.0 AE s.d) and post-menopausal women not taking HRT ( 7 1.21 AE 1.33) compared to the surgically reversed group (0.87 AE 2.36). The male group was most severely affected, despite normal serum testosterone concentrations. Two of the ®ve men studied, had a LS-BMD T score`7 2.5 and two had a LS-BMD T score between 7 1.0 and 7 2.5. In contrast, six of the seven post-menopausal women on HRT had an LS BMD T score b 7 1.0. There was no difference in the FN-BMD between the ®ve groups. The presence of low BMD was not related to age, duration of bypass, or degree of postoperative weight loss. Iliac crest bone biopsies in three subjects with low BMD, con®rmed the presence of osteoporosis. CONCLUSIONS: Reduced bone mineral density is a complication of jejunoileal bypass surgery.
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