Left panel: lymph node with reactive follicular hyperplasia. Discrete follicles, well separated by interfollicular tissue, are disposed predominantly in the cortex. Right panel: lymph node from a patient with follicular lymphoma, showing uniform nodularity throughout the node and little variation in size and shape of the follicles, which show a back-to-back arrangement.
From Warnke, RA, Weiss, LM, Chan, JK, Cleary, ML, Dorfman, RF. Tumors of the lymph nodes and spleen. Atlas of tumor pathology (electronic fascicle), Third series, fascicle 14, 1995, Washington, DC. Armed Forces Institute of Pathology.