SMARCB1 and nasal cavity and paranasal sinus carcinoma: SWI/SNF‐related matrix‐associated actin‐dependent regulator of chromatin subfamily B member 1 (SMARCB1) (integrase interactor 1 (INI-1))-deficient sinonasal carcinoma (SDSNC) is a rare and aggressive malignancy predominantly affecting the nasal cavity and paranasal sinuses, accounting for fewer than 1% of all head and neck neoplasms [1].