SMARCA4-deficient undifferentiated thoracic tumor (SMARCA4-UT) is a rare malignant tumor characterized by inactivation of the SMARCA4 gene and the presence of undifferentiated or rhabdoid morphology in the tissue. This tumor is highly invasive. typically diagnosed at advanced stages III or IV. and commonly involves thoracic structures. https://johnsmustangs.shop/product-category/1964-1973-engine-valve-cover/