Pouch young thylacine spleen with some white and red pulp (RP) differentiation.

<p>White pulp areas contain more tightly packed cells and include one area that is likely an early follicle (arrow). Red pulp areas are less densely packed and contain areas with more darkly stained cells, presumably of the erythrocyte lineage. No mature follicles or germinal centres are apparent. Scale bar 200μm.