“Rare” is a slippery word in medicine. Rare in the general population? Fine. But, for postpartum women with back pain, there is a surprisingly not-so-rare culprit.
In a retrospective review of 2,400 lumbosacral MRI examinations from 1,970 women aged 18 to 50, Bayram and colleagues found sacral stress/insufficiency fractures in 30 patients, for a crude MRI-based detection rate of 1.52%. After exclusions, the analytic rate was 23 of 1,970, or 1.17%.
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