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

DiagnosisLow powerNuclei

SLLDiffuse infiltrateRound
Pseudofollicles
Proliferation center
MZLMarginal zone expansionIrregular
Interfollicular monocytoid cells
Follicular colonization
MCLDiffuse or nodular infiltrateIrregular
Mantle zone expansion
Atrophic germinal center
FLMonotonous folliclesCleaved