 Other cells are also present in the thymus, including macrophages, dendritic cells, and a small amount of B cells, neutrophils and eosinophils.In the medulla, the network of epithelial cells is coarser than in the cortex, and the lymphoid cells are relatively fewer in number.Concentric, nest-like bodies called Hassall's corpuscles (also called "thymic corpuscles") are formed by aggregations of the medullary epithelial cells.