Research Article

Pigmented Cells in the Pineal Gland of Female Viscacha (Lagostomus maximus maximus): A Histochemical and Ultrastructural Study

Figure 2

Image of female pineal gland in mid pregnancy. A strong argentaffin reaction is exhibited in pigmented cells (arrowheads) and in extracellular space. Abundant pigment granules are dispersed throughout the parenchyma. The inset shows the argentaffin reaction with greater detail. Masson-Fontana silver method, counterstained with nuclear fast red. Scale bar: 25 μm. Inset scale bar: 5 μm.