TGFBR1 and posterior cortical atrophy: Furthermore, the expression of PCAT7, miR‐324‐5p, TGFBR1, p‐SMAD3, and SMAD3 was further determined in 4 random PCa/BM (T1‐T4) and 4 random PCa/nBM (T5‐T8) through qRT‐PCR and western blotting assays.