Trends in the use of diagnostic or other splenectomy (A), and splenectomy with or without chemotherapy (B), stratified by histologic subtype. For clarity, bars show stacked proportions in biennial intervals; P-values are for linearized annual trends for proportions undergoing any splenectomy (A) or any chemotherapy (B).
DLBCL: diffuse large B-cell lymphoma; FL: follicular lymphoma; MCL: mantle cell lymphoma; SMZL: splenic marginal zone lymphoma