Interfollicular neoplastic B cells in follicular lymphoma. (A-F) Three cases of follicular lymphoma with minimal (case 8; A, B), moderate (case 13; C, D), or prominent (case 2; E, F) CD20⁺ interfollicular neoplastic B-cell component. (G, H) High-power view of follicular (G) and interfollicular (H) components showing lower-grade cytology of interfollicular cells in case 13. (A, C, E, G, and H, H&E; B, D, and F, immunoperoxidase)