Frozen section of case 3 used for micromanipulation.

Anti-CD20 antibody staining, hematoxylin counterstain. (A) 150 FL B cells from 3 different follicles were micromanipulated (50 cells per follicle), 50 × magnification. (B) Follicle 1 after dissection from surrounding tissue with UV laser beam, 200 × magnification, and (C) after aspirating the cells with micropipettes, 200 × magnification.