ALK‐positive large B‐cell lymphoma with strong CD30 expression; a diagnostic pitfall and resistance to brentuximab and crizotinib. Issue 5 (19th July 2016) - Mehra, Varun; Pomplum, Sabine; Ireland, Robin; Yallop, Deborah; Devereux, Stephen; Marcus, Robert; Shah, Chirag; Patten, Piers; Kassam, Shireen