If you have Cushing's syndrome, your bones may be in more danger than a standard bone density scan suggests. A new review of published studies finds that fragility fractures strike between 11% and 76% of patients across series, and many of those breaks happen in people whose bone density reads as osteopenic or even normal.
The review looked at patients with overt endogenous Cushing's syndrome, meaning their bodies make too much cortisol on their own. About 30% to 50% of these patients have osteoporosis by bone density testing. But the real problem is bone quality: cortisol damages bone strength in ways density scans cannot see.
Even after successful treatment brings cortisol down, the skeleton recovers slowly and unevenly. Fracture risk stays elevated for years after remission. The review notes that no guidelines exist for managing bone health specifically in Cushing's syndrome, and evidence for bone drugs in this group is extremely limited.
This is a narrative review, not a pooled analysis, so the wide prevalence ranges reflect differences across published series rather than a single precise estimate. Still, the message is clear: bone health in Cushing's is under-assessed in routine practice, and fractures can happen even when scans look reassuring.
Common questions
How common are fractures in Cushing's syndrome?
Published series report fragility fractures in 11% to 76% of patients with Cushing's syndrome. That wide range reflects differences across studies, not a single precise number. Many fractures occur in people whose bone density is in the osteopenic or even normal range, so a normal scan does not rule out risk.
Why do fractures happen if bone density is normal?
Cortisol excess damages bone quality, not just bone quantity. Standard density scans measure how much bone you have, but they miss changes in bone structure and strength. The review notes that bone quality tools like Trabecular Bone Score, HR-pQCT, and bone marrow fat MRI can reveal problems that density scans miss.
Does bone health recover after Cushing's is treated?
Yes, but slowly and incompletely. The review found that skeletal recovery after successful treatment is slow, site-specific, and incomplete. Fracture risk remains elevated for years after remission, so ongoing monitoring matters even when cortisol levels normalize.
Are there guidelines for managing bone health in Cushing's syndrome?
No. The review states that no Cushing's-specific guidelines exist for bone management. Evidence for bone-active drugs in this condition is extremely limited. If you have Cushing's, talk to your doctor about assessing your bone health and what monitoring makes sense for you.
