Table 1: Useful morphologic findings in differential diagnosis of small B cell lymphomas.

Diagnosis Low power Nuclei SLL Diffuse infiltrate Round Pseudofollicles Proliferation center MZL Marginal zone expansion Irregular Interfollicular monocytoid cells Follicular colonization MCL Diffuse or nodular infiltrate Irregular Mantle zone expansion Atrophic germinal center FL Monotonous follicles Cleaved