This narrative review by Roberts et al. (2006) systematically describes the normal histology of the human intervertebral disc from embryonic development through adulthood, then characterizes the structural and cellular changes seen with aging, degeneration, herniation, and spinal deformity — asking whether aging and degeneration are truly distinct processes.
When counseling a patient about their MRI showing 'disc degeneration,' remember that the histological changes of degeneration are indistinguishable from normal aging — the disc starts losing vascularity before age ten and shows microscopic degenerative changes by age two, so imaging findings must always be interpreted in the context of symptoms.
When evaluating herniated disc specimens or managing patients with radiculopathy, the markedly elevated MMP expression and cellular senescence in herniated tissue help explain the inflammatory pain component and inform why anti-inflammatory strategies have biological rationale.
This narrative review by Roberts et al. (2006) systematically describes the normal histology of the human intervertebral disc from embryonic development through adulthood, then characterizes the structural and cellular changes seen with aging, degeneration, herniation, and spinal deformity — asking whether aging and degeneration are truly distinct processes.
When counseling a patient about their MRI showing 'disc degeneration,' remember that the histological changes of degeneration are indistinguishable from normal aging — the disc starts losing vascularity before age ten and shows microscopic degenerative changes by age two, so imaging findings must always be interpreted in the context of symptoms.
When evaluating herniated disc specimens or managing patients with radiculopathy, the markedly elevated MMP expression and cellular senescence in herniated tissue help explain the inflammatory pain component and inform why anti-inflammatory strategies have biological rationale.