Fig. 1.

a Male adolescent with backpain, no history of trauma reported. Lateral radiograph of the spine shows a vertebral fracture of the 12^th thoracic vertebra. There is a 35% loss of height, in keeping with a grade 2 fracture according to the Genant classification (moderate fracture, 25 to 40% loss of height). The 11^th thoracic vertebra and the 1^st lumbar vertebra also show mild wedging; measurements are not shown to prevent clutter of the image. b Girl with juvenile osteoporosis. Lateral radiograph of the spine shows multiple fractures. Measurement shows a 34% loss of height, in keeping with a grade 2 fracture according to the Genant classification (moderate fracture, 25 to 40% loss of height)