Swimmer plot showing relapse patterns in patients with concurrent DLBCL and an indolent lymphoma. For pathology at relapse, indolent lymphoma indicates consistent pathology as initial diagnosis, that is, FL in DLBCL + FL cases or other indolent lymphoma in DLBCL + LG cases. Composite lymphoma also indicates same histology as initial diagnosis. Other lymphoma included a mantle cell lymphoma in a DLBCL + FL case, and a classical Hodgkin lymphoma in a DLBCL + LG case. DLBCL + FL, DLBCL with concurrent FL; DLBCL + LG, DLBCL with concurrent other NHL.