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SMARCB1 (INI1) is a tumor-suppressor gene that has been implicated in a growing number of malignancies involving multiple anatomic sites, including the kidneys, soft tissues, and the CNS (See OMIM *601607). The authors describe a case series of 17 patients collected from 6 different centers to give a comprehensive description of the appearance of these tumors on CT, MR, and PET/CT studies. SMARCB1 (INI1)-deficient sinonasal carcinoma should be included in the differential diagnosis of a central sinonasal mass demonstrating aggressive imaging features, particularly when there is associated calcification.