The segment of GASTROINTESTINAL TRACT that includes the ESOPHAGUS; the STOMACH; and
the DUODENUM.
https://sides.uness.fr/corpus/Chirurgie-Digestive:Prise_en_charge_m%C3%A9dico-chirurgicale_des_ingestions_de_caustique_du_tube_digestif_haut 2021 France educational course gastrointestinal tract patient care management Surgery caustics eating digestive system surgical procedures tube, nos upper gastrointestinal tract digestants operative procedure, nos ingestion digestant, nos digestion digestive surgery ingestion digestive tract function, nos Digestive tract
--- https://www.medg.fr/cancer-vads-generalites 2019 France teaching material scientific and technical information Malignant tumor upper gastrointestinal tract digestants Malignant tumors neoplasms malignant neoplasm of gastrointestinal tract, nos Malignant tumors Malignant tumors upper digestive tract Malignant tumors digestive system neoplasms vision, ocular digestion