Scoliosis

Scoliosis is a sideways curve of the spine, often forming an S or C shape when viewed from behind. It can show up in childhood or the teen years, but it can also develop or worsen later in life as spinal discs and joints wear down or as bone density changes with age. Mild curves often cause no symptoms, while larger ones can lead to back pain, uneven shoulders or hips, or a visible curve.

Scoliosis matters for bone health in a less obvious way too: it can throw off bone density test results. On a DEXA scan of the lumbar spine, a curved or arthritic spine can make the bone look denser than it really is, because the scan is reading extra bone from curves, overlapping vertebrae, or nearby calcium deposits. This is why spine results need a careful eye.

Because of this, doctors often rely more on the hip (femoral neck) for an accurate bone density reading in people with noticeable scoliosis or spinal arthritis, and may exclude certain vertebrae from the spine score if they look very different from their neighbors. A vertebral fracture assessment, done on the same machine, can also spot spine fractures that a density score alone might miss.