Among ALK rearrangements in IMT >10 different ALK fusion partner genes have been identified (in IMT), including TPM3/4, RANBP2, TFG, CARS, ATIC LMNA, PRKAR1a, CLTC, FN1, SEC 31A, and EML4. The gene discussed is FN1; the disease is inflammatory myofibroblastic tumor.