TP53 and diffuse large B-cell lymphoma: Due to the known prognostic value of TP53 mutation shown by data from the literature [10,16,17,23] and from our own study group [8], TP53 mutational analyses have been frequently performed at our institute since 2010 as part of the diagnostic routine work-up for relapsed/refractory DLBCL and DHL/THL.