SMARCA4 and neoplasm of thorax: The designation was changed from SMARCA4-DTS to SMARCA4-UT, and the disease was categorized into two subtypes: SMARCA4-deficient undifferentiated thoracic tumors (SMARCA4-UT) and SMARCA4-deficient non-small cell lung cancer (SMARCA4-dNSCLC) (8, 9).