PTH and idiopathic juvenile osteoporosis: For instance, a recent case report by Shimazaki et al. [32] described an 11-year-old boy with idiopathic juvenile osteoporosis who presented with multiple thoracic and lumbar vertebral compression fractures, yet had completely normal laboratory results, including serum calcium, phosphorus, bone alkaline phosphatase, intact parathyroid hormone, and vitamin D levels.