While reports show detection of the unique CLTC-ALK fusion by either reverse transcription-polymerase chain reaction or fluorescence in situ hybridization, our case represents the second case in the literature to detect the t(2;17)(p23;q23) translocation by multiplex karyotyping (multiplex fluorescence in situ hybridization) and the usefulness of this technique to detect hidden translocations not seen by G-banding. 