Dr. Sawas completed his internal medicine training at Georgetown University Washington Hospital Center. Drawn by the opportunity to perform a vast array of diagnostic and therapeutic procedures to contribute to the health and wellbeing of patients, he completed his Gastroenterology fellowship at the Mayo Clinic, Rochester, MN. Subsequently, he dedicated an additional year to train in advanced endoscopy at the Mayo Clinic which equipped him with the necessary skills to endoscopically treat patients with gastrointestinal cancer and obesity.

Dr. Sawas brings to UTSW a strong background in therapeutic endoscopy and malignant gastrointestinal disorders. He specializes in pancreaticobiliary diseases, bariatric endoscopy, esophageal cancer and endoscopic resection. His clinical practice includes endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), 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.

Dr Sawas has additional training in clinical research. He completed a Master of Public Health and epidemiology at Harvard University. He is the receiver the American Gastroenterology Association (AGA) early career investigator and the 2019 Summerskill’s award from the Mayo Clinic which recognizes outstanding research achievement. He has published extensively in prestigious journals on esophageal cancer, bile duct cancer and bariatric endoscopy. He also servs as a reviewer to multiple journals.

Dr Sawas decision to join UTSW was mainly driven by his passion to serve patients, educate the next generation of doctors and perform cutting edge research. He was driven by the collaborative multidisciplinary team approach which is focused on assuring best care and putting patients’ interest above all. He was attracted to the intuitional support and infrastructure which nourished physicians and scientists to pursue the highest level of impactful research.

Dr. Sawas interests outside of medicine include his family, tennis, and hiking.


Medical School
Damascus University School of Medicine, Syria (2010)
Washington Hospital Center/Georgetown University Hospital (2014), Internal Medicine
Graduate School
Harvard T.H. Chan School of Public Health (2017)
Other Post Graduate Training
Harvard University T.H Chan School of public health (2017)
Mayo Clinic College of Medicine and Science (2019), Gastroenterology

Research Interest

  • Bariatric Endoscopy Outcomes
  • Esophageal Cancer Risk Factors and Treatment
  • Pancreaticobiliary Cancer


Featured Publications LegendFeatured Publications

Risk Factor Profiles Can Distinguish Esophageal Adenocarcinoma From Barrett's Esophagus.
Sawas T, Dilmaghani S, Dhaliwal L, Wang KK, Iyer PG, Katzka DA, Am J Gastroenterol 2021 01 116 1 198-201
Laparoscopic hernia repair and fundoplication with endoscopic sleeve gastroplasty for complex hernia and GERD management in morbid obesity.
Sawas T, Marya NB, Storm AC, Blackmon SH, Abu Dayyeh BK, VideoGIE 2020 Nov 5 11 555-556
Every trick in the book: EUS angiotherapy for management of refractory bleeding secondary to a complicated duodenal ulcer in a patient with Roux-en-Y gastric bypass.
Marya NB, Sawas T, Chandrasekhara V, Jaruvongvanich V, Maselli D, Levy MJ, Matar R, Storm AC, Abu Dayyeh BK, VideoGIE 2020 Oct 5 10 461-463
Utilisation of artificial intelligence for the development of an EUS-convolutional neural network model trained to enhance the diagnosis of autoimmune pancreatitis.
Marya NB, Powers PD, Chari ST, Gleeson FC, Leggett CL, Abu Dayyeh BK, Chandrasekhara V, Iyer PG, Majumder S, Pearson RK, Petersen BT, Rajan E, Sawas T, Storm AC, Vege SS, Chen S, Long Z, Hough DM, Mara K, Levy MJ, Gut 2020 Oct
Start of a new TREnD: TransRemnant Endoscopic Drainage for management of walled-off necrosis in a patient with Roux-en-Y gastric bypass.
Marya NB, Sawas T, Chandrasekhara V, Jaruvongvanich V, Maselli D, Levy M, Martin J, Petersen BT, Storm AC, Abu Dayyeh BK, VideoGIE 2020 Sep 5 9 421-424
Surgical outcomes of ERCP-guided transpapillary gallbladder drainage versus percutaneous cholecystostomy as bridging therapies for acute cholecystitis followed by interval cholecystectomy.
Kaura K, Bazerbachi F, Sawas T, Levy MJ, Martin JA, Storm AC, Wise KB, Reisenauer CJ, Abu Dayyeh BK, D Topazian M, Petersen BT, Schiller HJ, Chandrasekhara V, HPB (Oxford) 2020 Jul 22 7 996-1003
ERCP-directed electrohydraulic lithotripsy for treatment of cystic duct and remnant gallbladder stones.
Marya NB, Martin JA, Sawas T, Abu Dayyeh BK, Levy MJ, Storm AC, Petersen BT, Chandrasekhara V, VideoGIE 2020 Jul 5 7 300-303
Cholangioscopy Biopsies Improve Detection of Cholangiocarcinoma When Combined with Cytology and FISH, but Not in Patients with PSC.
Kaura K, Sawas T, Bazerbachi F, Storm AC, Martin JA, Gores GJ, Abu Dayyeh BK, Topazian MD, Levy MJ, Petersen BT, Chandrasekhara V, Dig. Dis. Sci. 2020 May 65 5 1471-1478
Safety and histologic outcomes of endoscopic submucosal dissection with a novel articulating knife for esophageal neoplasia.
Genere JR, Priyan H, Sawas T, Hanada Y, Visrodia K, Zakko L, Iyer PG, Wong Kee Song LM, Wang KK, Gastrointest. Endosc. 2020 Apr 91 4 797-805
An innovative technique using a percutaneously placed guidewire allows for higher success rate for ERCP compared to balloon enteroscopy assistance in Roux-en-Y gastric bypass anatomy.
Sawas T, Storm AC, Bazerbachi F, Fleming CJ, Vargas EJ, Chandrasekhara V, Andrews JC, Levy MJ, Martin JA, Petersen BT, Topazian MD, Abu Dayyeh BK, Surg Endosc 2020 02 34 2 806-813

Honors & Awards

  • William H. Summerskill Outstanding Research Award
    Mayo Clinic Department of Medicine (2019)
  • Early Career Investigator
    American Gastroenterology Association (2018)
  • Excellence in Research Award
    Medstar Research Institute (2014)

Professional Associations/Affiliations

  • American College of Gastroenterology (2017)
  • American Society of Gastrointestinal Endoscopy (2016)
  • American Gastroenterology Association (2015)