...a 58‐year old man treated with crizotinib as first‐line treatment after 2.6 month…The tumor specimen harbored EML4_E13:ALK_E19 fusion and the matched blood plasma was detected with a novel LTBP1_E2:ALK_E11 fusion variant with EML4_E13:ALK_E19 and concomitant L1196M mutation at disease progression.