[Investigation of gastro-intestinal lesions by real-time ultrasonography].
D003110:Colonic Neoplasms / Q000175:diagnosis; D005756:Gastritis / Q000175:diagnosis*; D006801:Humans; D013274:Stomach Neoplasms / Q000175:diagnosis*; D013276:Stomach Ulcer / Q000175:diagnosis; D014463:Ultrasonography / Q000379:methods*