Background: Late acute graft-versus-host disease (aGVHD) is a complication of allogeneic hematopoietic stem cell transplantation (allo-HSCT) with little data regarding treatment and outcomes. There is no standard treatment for gastrointestinal (GI) late aGVHD. especially for steroid-refractory (SR) GI late aGVHD. Vedolizumab. https://storeanimalwiz.shop/product-category/litter-boxes/