MMP7 and breast angiosarcoma: In a meta-analysis and systematic study in 2020 on 4 studies involving 593 neonates, it was reported that the mean sensitivity and specificity of MMP-7 for the detection of BA were 0.96 (95% CI: 0.93–0.98) 0.91 (95% CI: 0.85–0.95), respectively [11].