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Expression of IgM (less often IgA or IgG)
CD21+, CD35+, CD20+, CD79a+
CD5-, CD10-, CD23-
CD43+/-, CD11c+/- (weak).
t(11;18)(q21;q21) in 15-40%
t(14;18)(q32;q21) in >38%
t(1;14)(p22;q34) in <5%
t(3;14)(p14;q32) in 20%
Pathology