Synchronous Malignant Gastrointestinal Neuroectodermal Tumor and SMARCA4-Deficient Undifferentiated Carcinoma With Independent Origins in the Small Intestine: A Case Report
BackgroundMalignant gastrointestinal neuroectodermal tumor (GNET) is a rare malignant mesenchymal neoplasm that commonly arises in the small bowel, stomach or colon.Meanwhile, SMARCA4-deficient undifferentiated carcinoma is a rarely 117 varick street reported entity with highly aggressive behavior that may involve the ovary, lung, gastrointestinal