He specializes in pancreaticobiliary diseases, bariatric endoscopy, esophageal cancer, and endoscopic resection.

Dr. Sawas’ clinical practice includes endoscopic retrograde cholangiopancreatography (ERCP); endoscopic ultrasound (EUS); and endoscopy to treat weight gain, such as endoscopic sleeve gastroplasty (ESG), transoral outlet reduction (TORe) in patients with weight regain after weight loss surgery (Roux-en-Y gastric bypass), and endoscopic mucosal resection to treat early cancer in a minimally invasive way.