Validation of multisociety combined task force definitions of abnormal disk morphology.

AJNR. American Journal of Neuroradiology
C H ChoC M Bono

Abstract

The multisociety task force descriptively defined abnormal lumbar disk morphology. We aimed to use their definitions to provide a higher level of evidence for the validation of MR imaging in the evaluation of this pathology in patients who have undergone diskectomy by retrospectively classifying their preoperative MRI. This retrospective, institutional review board-approved study included 54 of 86 consecutive patients (47 men; average age, 44 years) enrolled in an ongoing prospective trial of surgically treated lumbar disk herniation who had preoperative MRI and documented intraoperative classification of the abnormal disk as protrusion, extrusion, or sequestration by the treating surgeon. Preoperative MRI was classified by 2 blinded radiologists; discrepancies were resolved by a third reader. Statistical analysis of interobserver agreement and imaging compared with surgical findings was performed. The readers disagreed on only 1 of the 54 cases. The third reader resolved the disagreement. Eight protrusions and 46 extrusions were found on imaging, with no sequestrations. At surgery, there were 13 protrusions and 40 extrusions, with 2 of the extrusions also containing sequestrations; the remaining case had only sequestration. Th...Continue Reading

References

Mar 1, 1988·AJR. American Journal of Roentgenology·M C HedbergC R Bird
Apr 1, 1988·The Anatomical Record·M D Humzah, R W Soames
May 1, 1986·Spine·N Tajima, K Kawano
Sep 22, 2007·Radiology·Michael T Modic, Jeffrey S Ross

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