Fig. 1From: Ruxolitinib in steroid refractory graft-vs.-host disease: a case reportHistology studies (H&E). a–c Gastrointestinal acute grade I GVHD: focal apoptosis of crypt epithelial cells (white arrows) without abscess or crypt destruction. A clear lymphocytic infiltration of the lamina propria is not present. Moderate mucosal atrophy can be observed. d Duodenum at day +54 post-transplant: complete reconstitution of the mucosa with disappearance of apoptotic crypt cells (courtesy of D. Novero, Pathology, University of Turin)Back to article page