Lymphomas with plasma cell differentiation Follicular lymphoma Two types of follicular lymphomas with clonally related plasmacytic differentiation Interfollicular distribution usually with BCL2 translocations Intrafollicular/perifollicular distribution usually lacks BCL2 translocations, share some features with marginal zone lymphomas demonstrating extensive follicular colonization Morphology Signet ring cell (IgG)Russell body (IgM)