Immunohistochemical analysis demonstrated positivity for Cytokeratin 7 (CK7), Transcription Termination Factor 1 (TTF1) and SWI/SNF-related, matrix-associated, actin-dependent regulator of chromatin, subfamily A, member 4 (SMARCA4) in the metastatic small intestinal tumor. This evidence concerns the gene KRT7 and small intestine neoplasm.