2 to better categorize degenerative discs in older patients where most discs are Pfirrman grade III or IV. there is no more difference between the nucleus and annulusĪ modified classification was proposed in 2007 by Griffith et al.disc is inhomogeneous with a hypointense black signal intensity. If one of these discs bulges out, it may, rarely, cause pain in the lower back, buttock or leg. The disc L5-S1 is the one between the 5th lumbar and 1st sacral vertebra in the lower back. disc height is slightly or moderately decreased What does the diffuse disc bulge L4-L5 or L5-S1 mean The disc L4-L5 is the one between the 4th and 5th lumbar vertebra in the lower back.there is no more distinction between the nucleus and annulus.disc is inhomogeneous with a hypointense dark gray signal intensity.disc height is normal or slightly decreased.The good news is that most cases of lumbar degenerative disc disease do not require surgery. The taller, grey colored discs are more normal. Note the darkened color and loss of disc height suggesting disc desiccation (drying out). distinction between nucleus and annulus is unclear Above: Sagittal (side view) lumbar MRI shows lumbar disc degeneration of the bottom 3 discs.disc is inhomogeneous with an intermittent gray signal intensity Disc desiccation (also known as disc dehydration) is an extremely common degenerative change of intervertebral discs.nucleus and annulus are clearly differentiated, and a gray horizontal band could be present.disc is inhomogeneous but keeping the hyperintense white signal.grade I: disc is homogeneous with bright hyperintense white signal intensity and normal disc height.Back pain from a degenerative disc is typically worse with sitting, bending, twisting. It is generally a chronic, mild to moderate aching sensation, with intermittent flare-ups of severe pain lasting for a few days or weeks. The pain is usually located in the midline of the lower back. The intra- and inter-observer agreement of the Pfirrmann grading system is excellent 3. Back pain is a common symptom of an L5-S1 degenerative disc. The Pfirrmann grading system is the most widely known classification for intervertebral disc degeneration and is used in both clinical and research capabilities 2,3. Disc degeneration can be graded on MRI T2 weighted images.
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