PTH and osteoporosis: The validity of this technique for measurement of vertebral cancellous bone is widely accepted.11 Evaluations of BMD by QCT or HRQCT have recently been reported in the assessment of the effects of full-length human parathyroid hormone (PTH[1–84]) and teriparatide in postmenopausal women with osteoporosis7,12–16 or with GIO,17 as well as in men with osteoporosis.18 However, there are no randomized controlled studies on treatment of GIO in men using these technologies.