Figure 5From: Expression of semaphorin 3A and its receptors in the human intervertebral disc: potential role in regulating neural ingrowth in the degenerate intervertebral discImmunohistochemical localisation of CD31 and PGP9.5 staining in the disc. (a) OAF of degenerate disc with neurovascular ingrowth staining positive for PGP9.5. (b) OAF illustrating blood vessel ingrowth in the degenerate disc, demonstrating positive endothelial cell staining for CD31.Back to article page