Evidence grade: WEAK — Supported only by weak or preliminary evidence.
computed from the encoded evidence by the Atlas grading rule.
Morphological grading captures dural-sac deformity better than AP diameter and correlates with symptoms
Grading systems disagree with each other and with surgical findings; interobserver reliability is only moderate and correlation with function is weak
Determines whether imaging grade should drive surgical referral; over-reliance risks operating on radiological rather than clinical severity.
This is an educational research resource from Resonant Labs, not clinical advice. Evidence grades and controversies are summarized from the literature and may change as the field evolves.