Genetic rearrangements in the Anaplastic Lymphoma Kinase (ALK) gene result in the creation of a variety of oncogenic fusion proteins that drive malignancy in a subset of non-small cell lung cancers (NSCLC) patients. Treatment with the ALK small tyrosine kinase inhibitor (TKI) crizotinib has produced remarkable results for ALK-positive patients, however the current diagnostic tests used in the clinic are not sufficiently detailed and require a tumor biopsy.