11. “ It is clear from clinical experience and formal studies that when a patient presents with spinal pain there are no clinical features that permit the source of pain to be diagnosed. Even imaging studies do not provide a diagnosis. The appropriate investigations are the ones that answer the questions ( where does the pain come from )” Bogduk et al
22. CONTRAST DISTRIBUTION [80] : (AS EVALUATED BY FLUOROSCOPY )   Disk has a complete radio fissure that allows injected fluid to escape. Can be in any stage of degeneration.  “ Ruptured” (R)  Degenerated disk with radio fissure leading to the outer edge of the annulus.  “ Fissured” (F)  Degenerated disk with fissures and clefts in the nucleus and inner annulus.  “ Irregular” (I)  Mature disk with nucleus starting to degenerate into fibrous lumps.  “ Lobular” (L)  No signs of degeneration, Soft white amorphous nucleus  “ Cotton Ball” (CB)  Stage of Disk Degeneration (C-arm View)  Discogram Type “ Ruptured” “ Fissured” “ Irregular” “ Lobular” “ Cotton Ball”