Fig. 1. (A) Sanger Sequencing of healthy control, affected individual (homozygous c.757G>A variant), and unaffected mother and father (heterozygous c.757G>A variant). (B) Staining with hematoxylin and eosin revealed villus abnormalities, including epithelial crowding, disorganization, and focal tufting (arrows) with no epithelial lymphocytosis shown at 400× magnification.