SMARCB1 and carcinoma: Another particularity of this case was the absence of tumor and lymph node metabolism on the FDG PET–CT examination, which is in contrast to the imaging appearance of SMARCB1 (INI1)-deficient sinonasal carcinoma described as having avidity to FDG on FDG PET–CT [12], as well as the rapid growth of this carcinoma.