Esigabeni sokuqala sesimila somgudu wokugaya ukudla, azikho izimpawu ezingakhululekile futhi abukho ubuhlungu obusobala, kodwa amangqamuzana egazi abomvu esitulweni angatholakala ngokuhlolwa kwendle okuvamile nokuhlolwa kwegazi okulumba, okubonisa ukopha kwamathumbu.I-Gastroscopy ingathola izinto eziphilayo ezintsha ezivelele emgudwini wamathumbu ekuqaleni kwesigaba.