Canine thymus, medulla with Hassall’s corpuscles
![](https://sites.tufts.edu/vetimages/files/2021/07/Canine_thymus_medulla_with_Hassall_s_corpuscles-20327.jpg)
Organ: Thymus, Tissue: Medulla, Species: Dog. Comments: In the medulla of the thymus the cells are further apart. Thus the region stains lighter. Note the thymic (Hassall’s) corpuscles. These are characteristic of the medulla.