the gvh reaction induces 2 types of thymic lesion , a stress-related effect causing atrophy of the thymic cortex and a cytolytic process causing severe-to-moderate lesions in the thymic medulla as a consequence of injury to medullary epithelial cells and a loss of hassall 's corpuscles ( thymic dysplasia ) .
C0040113
thymic
C0229949
thymic medulla