t(11;14)-positive mantle cell lymphomas lacking cyclin D1 (CCND1) immunostaining because of a CCND1 mutation or exclusive expression of the CCND1b isoform - Ingram Iaccarino; Lamis Afify; Sietse M. Aukema; Katharina Reddemann; Philipp Schütt; Martin Flür; Wolfram Klapper (Haematologica, 2018)