Rugger-jersey spine in osteopetrosis

Description

A 30-year-old Japanese man presented to our hospital with a fall injury. He had no medication or family history. His height and weight were within the normal ranges, and physical and neurological examination results were non-specific. His calcium and phosphorus levels were within the standard limits. X-ray images showed calcification of the lumbar vertebrae, bilateral sacroiliac joint, acetabulum and caput femoris where gravity was applied (figures 1 and 2). The border of the lumbar vertebrae ossification was very clear and did not touch the endplate. In the pelvic frontal view, ossification was also located inside of the bone and it was consistent with the absence of symptoms such as joint pain. The imaging characteristics of osteopetrosis are 'sandwich vertebrae', 'rugger-jersey spine' and 'bone within a bone'. He was diagnosed with osteopetrosis. Although similar ossification is seen in hyperparathyroidism, the border of the ossification is...

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