Ingram Iaccarino, Lamis Afify, Sietse M. Aukema, Katharina Reddemann, Philipp Schütt, Martin Flür, Wolfram Klapper. t(11;14)-positive mantle cell lymphomas lacking cyclin D1 (CCND1) immunostaining because of a CCND1 mutation or exclusive expression of the CCND1b isoform. Haematologica 2018;103(9):e432-e435; https://doi.org/10.3324/haematol.2018.192435.