LM of a lymph node at low magnification. Reticular fibers are seen as a fine, dark meshwork with silver impregnation. They form a delicate stroma supporting the lymphatic cells. 5×. Modified Bielschowsky ammoniacal silver

LM of the cortex of a lymph node at medium magnification. Reticular fibers are delicate black threads (arrows). These thin, long branching fibers form the node?s structural framework. Collagen fiber bundles in the capsule and blood vessels (BV) do not have an affinity for silver and are reddish brown. 280×. Modified Bielschowsky ammoniacal silver
LM of the medulla of a lymph node at high magnification. Reticular fibers (arrows) are the branching linear elements that are darkly stained with silver. They form a loose network associated with lymphoid cells, whose pale nuclei can be seen. A large macrophage (Ma) is recognizable by the presence of ingested particles in its cytoplasm. 550×. Modified Bielschowsky ammoniacal silver