Journal of Clinical Endocrinology & Metabolism, Vol 81, 1152-1155, Copyright © 1996 by Endocrine Society

ARTICLES

A longitudinal evaluation of bone mineral density in adult men with histories of delayed puberty

JS Finkelstein, A Klibanski and RM Neer
Department of Medicine, Massachusetts General Hospital, Boston 02114, USA.

We have previously demonstrated that men with histories of constitutionally delayed puberty have significantly lower spinal and radial bone mineral density than normal men. Because these men were in their mid-twenties, it is possible that bone density was decreased because bone development was still incomplete. In addition, there is no information on the bone density of the proximal femur, the most important clinical site for osteoporotic fractures, in men with histories of delayed puberty. To address these issues, we performed repeat measurements of radial and spinal bone mineral density 2 yr after the initial evaluations in 18 men with histories of delayed puberty. Bone mineral density of the femoral neck was also measured at the time of follow-up evaluations. The mean radial bone mineral density at the time of the repeat evaluations was similar to the mean value from the initial evaluations (0.74 +/- 0.08 vs. 0.74 +/- 0.07 g/em2) and the mean change was 0.00 +/- 0.04 g/cm2. Similarly, the mean spinal bone mineral density at the time of the repeat evaluations was similar to the mean value from the initial evaluations (1.02 +/- 0.10 vs. 1.01 +/- 0.10 g/cm2) and the mean change was -0.01 +/- 0.04 g/cm2. Bone mineral density of the femoral neck was significantly lower in the men with histories of delayed puberty than in normal men (0.88 +/- 0.11 vs. 0.98 +/- 0.14 g/cm2 P < 0.02). These data indicate that bone accretion is complete by the mid-twenties in men with histories of constitutionally delayed puberty and that their bone mineral density does not improve with time. In addition, these men have decreased bone density of the femoral neck, which might increase their risk for hip fractures when they are older.

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