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FAST profile of intervertebral disc under extended protocol
| Compartment | Subdivision | Matrix color | Cell color (pericellular) |
|---|---|---|---|
| Growth plate | Red | Blue | |
| Bone | Yellowish green | Nil | |
| Annulus fibrosus | A1 | Greenish blue | Blue |
| A2 | Greenish blue with blue patches | Blue (orange halo) | |
| A3 | Blue | Blue (orange halo) | |
| A4 | Blue | Blue (orange stretch) | |
| Nucleus pulposus | Blue | Orange (orange halo) | |
| Cartilaginous endplate | Orange | Blue |
