_:vb50954051 . _:vb50954051 . _:vb50954051 . . "An ampulla of Vater carcinoma that derives_from epithelial squamous cells."^^ . . "DOID:5527"^^ . . . "disease_ontology"^^ . "NCI:C27417"^^ . _:vb50954051 . "UMLS_CUI:C1332251"^^ . "ampulla of Vater squamous cell carcinoma"^^ . . _:vb50954051 .