COL5A2 and keloid: When the diagnostic value of these key genes were evaluated between the normal skin from keloid-prone or normal individuals (GSE113619), the AUC values of COL1A1, COL1A2, COL3A1, COL5A1, and COL5A2 in keloid were 0.650, 0.625, 0.575, 0.525, and 0.450, respectively (Figure 12(e)).