Osteopenia in Primary and Secondary Amenorrhea

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Abstract
This study aimed at investigating the prevalence of osteopenia among a hypoestrogenic group of patients with primary or secondary amenorrhea. Twenty-seven patients with amenorrhea were examined. Sixteen of them presented with secondary amenorrhea (mean age 27.8 ± 1.9 yrs), and 11 with primary amenorrhea (mean age 21.3 ± 1.6 yrs). Ten regularly menstruating women (mean age 28.9 ± 1.4 yrs) served as controls. Estradiol serum levels as well as lumbar spine bone mineral density were measured. All 11 patients with primary amenorrhea showed osteopenia with a mean bone mineral density Z-score of 71 ± 2% and mean estradiol levels of 30.6 ± 5.9 pg/ml. The secondary amenorrheic patients were significantly demineralized with a mean Z-score of 82 ± 3%; 10 of them had osteopenia. Their mean estradiol levels were 34.3 ± 2.9 pg/ml. The bone density in the primary amenorrheic patients was significantly lower as compared with the secondary amenorrheic women. In comparison, lumbar spine bone density in all control women was normal with a mean Z-score of 104 ± 3%. In summary, 21 of the 27 patients had osteopenia, higher than that reported in post-menopausal women. Since it is not proven whether the bone mineral deficit of amenorrheic patients can ever be compensated, early diagnostic steps and estrogen-progestogen replacement for the prevention of further bone loss and subsequent fractures are recommended.

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