MMP9 and endophthalmitis: In the vitreous (Figure 1B), the majority of cytokines tested were significantly elevated in endophthalmitis patient samples compared with control patients, including CRP (p = 0.0004); Cystatin C (p = 0.048); IGFBP-4 (p = 0.017); MMP-9 (p < 0.0001); MPO (p < 0.0001); Calprotectin (p < 0.0001); myoglobin (p = 0.0151); NGAL (p < 0.0001); SAA (p < 0.0001); and VCAM-1 (p = 0.0387).