Similar to Suh et al. [4]’s results, Korean MDD patients presented cortical thinning in the bilateral medial (left—F(1,71) = 8.117, p = 0.006; right—F(1,71) = 21.795, p < 0.001) and in the right lateral (F(1,71) = 9.932, p = 0.002) OFC compared to healthy controls, regardless of their MAOA uVNTR genotype (MAOA uVNTR high-activity allele carriers, 3R/4R and 4R/4R, or MAOA uVNTR low-activity allele carriers, 2R/3R and 3R/3R). This evidence concerns the gene MAOA and major depressive disorder.