Dieulafoy's lesion are typically diagnose during endoscopic evaluation, usually during upper endoscopy. Disposable endoscopy is an emerging category of endoscopic instruments. For morphological imaging, CT-scans, MRIs, sonography (ultrasound), and endoscopy (including endoscopic ultrasound) are commonly used. The feeding tube is usually inserted by percutaneous endoscopic gastrostomy (PEG). Esophageal webs and rings can be treated with endoscopic dilation. GAVE is usually diagnosed definitively by means of an endoscopic biopsy. Imaging investigations including CT scans or endoscopic ultrasound are useful to stage disease. Diagnosis is achieved through radiography and endoscopic evaluation. Endoscopic ultrasonography is another more sensitive option. More recently, there has been success with endoscopic, or minimally invasive, approaches. This is usually easily diagnosed with endoscopic biopsies. In people who have no response to medical or endoscopic therapy, surgery can be performed. This is typically in addition to endoscopic banding or sclerotherapy for the varices. This is in addition to endoscopic banding or sclerotherapy for the varices. The tumor is primarily excised by external or endoscopic approach.