Photomicrographs show metastatic lymph nodes from poorly (A) and highly (B) differentiated squamous cell carcinomas.A, Poorly differentiated cancer cells.

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Photomicrographs show metastatic lymph nodes from poorly (A) and highly (B) differentiated squamous cell carcinomas.A, Poorly differentiated cancer cells with high nuclear-to-cytoplasmic ratios are densely packed in metastatic node.B, Highly differentiated ... Photomicrographs show metastatic lymph nodes from poorly (A) and highly (B) differentiated squamous cell carcinomas.A, Poorly differentiated cancer cells with high nuclear-to-cytoplasmic ratios are densely packed in metastatic node.B, Highly differentiated cancer cells are loosely packed, and amorphous materials (*), probably produced by cancer cells, and fibrous tissues (**) are frequently observed. (Hematoxylin and eosin, original magnification ×200)‏ Misa Sumi et al. AJNR Am J Neuroradiol 2003;24:1627-1634 ©2003 by American Society of Neuroradiology