Cytomorphologic features of FL 3.

(A) FL 3a. Neoplastic infiltrate is composed of large noncleaved cells (centroblasts) and small to medium-sized, sometimes large, cleaved cells (centrocytes). (B) FL 3b. A population of small and large noncleaved cells (centroblasts) is seen, without an admixture of centrocytes. Original magnification, × 800. Stained with Giemsa.