FIG.1. Phase-contrast micrographs of dendritic cells isolated from peripheral lymphoid organs and fixed in glutaraldehyde. Figs.1 a-d are from spleen, (e) from cervical lymph node, and (f) from Peyer's patch. The nucleus is large, irregular in shape, and has a refractile quality. The cytoplasm is arranged in processes of varying sizes and shapes, many of which contain spherical phase-dense mitochondria.
From J. Exp. Med. 137: 1142-1162(1973)
Ralph Steinman, Zanvil Cohn, dendritic cells