A statistically significant (P < .05) differential expression and a fold change of more than 2 were determined between keloid margin and internal control biopsy samples for 10 genes, including ACAN, ASPN, C5orf13, HIF1A, IGFBP7, INHBA, LGALS1, PTN, SERPINH1, and TNFAIP6 (Table 5). Here, PTN is linked to keloid.