Thoracic SMARCA4-deficient undifferentiated tumor
January 2024—Thoracic SMARCA4-deficient undifferentiated tumor (TSDUT), formerly known as SMARCA4-deficient thoracic sarcoma and SMARCA4-deficient thoracic sarcomatoid tumor, is a relatively newly defined entity with a distinct clinical history, morphology, immunohistochemical profile, molecular findings, and clinical behavior.