Corneal Dystrophy, Posterior Polymorphous, 4, also known as posterior polymorphous corneal dystrophy 4, is related to corneal dystrophy and corneal dystrophy, posterior polymorphous, 3. An important gene associated with Corneal Dystrophy, Posterior Polymorphous, 4 is GRHL2 (Grainyhead Like Transcription Factor 2), and among its related pathways/superpathways are Epithelial to mesenchymal transition in colorectal cancer and Mammary gland development pathway - Embryonic development (Stage 1 of 4). Affiliated tissues include endothelial and eye, and related phenotypes are ectopia pupillae and reduced visual acuity