Thomas Tielleman, M.D. Titles and Appointments Assistant Professor School Medical School Department Internal Medicine You have reached the Academic Profile. For more information on the doctor and patient care, please visit the clinical profile. Biography Tom Tielleman, M.D., is an Assistant Professor in the Department of Internal Medicine at UT Southwestern Medical Center and a member of its Division of Digestive and Liver Diseases. He specializes in therapeutic endoscopy, biliary disorders, and pancreatic cancer prevention. Dr. Tielleman holds a bachelor's degree in biochemistry and molecular biology with honors from Trinity University in San Antonio. He earned his medical degree at UT Southwestern, where he completed internal medicine residency training, and fellowships in gastroenterology and therapeutic endoscopy. He was named Chief Fellow during his gastroenterology fellowship. Certified by the American Board of Internal Medicine in internal medicine and gastroenterology, he joined the UT Southwestern faculty in 2021. The immediate impact a number of our procedures I mcan have for patients motivates me to continue to grow as a physician, endoscopist, and educator so that our patients can receive the best possible care imaginable. Dr. Tielleman's research interests align with his clinical interests which focus on multiple forms of therapeutic endoscopy and treat a wide variety of ailments including, endoscopic retrograde cholangiopancreatography (ERCP) for complex pancreaticobiliary procedures as well as endoscopic ultrasound to assist with cancer diagnoses, minimally invasive drainage of abnormal fluid collections, and management of gastric varices. Dr. Tielleman has undergone additional advanced training in the field of third space endoscopy, which includes peroral endoscopy myotomy (POEM) and endoscopic submucosal dissection (ESD). He performs POEM to treat Achalasia, Zenker's diverticulum, and Gastroparesis in a minimally invasive/non-surgical fashion. Dr. Tielleman has also undergone extensive training and proctorship with both American and Japanese masters in ESD, a procedure used to remove tumors from the gastrointestinal tract. ESD was initially developed by the Japanese in the 1990s to remove early gastrointestinal cancers. Over time, the procedure has spread through Europe and now to North America to allow for a minimally invasive way to entirely remove pre-cancerous lesions and early gastrointestinal cancers without the need to surgically remove the underlying organ. Dr. Tielleman's non-clinical focus includes developing simulation and hands-on endoscopy training for the UT Southwestern Gastroenterology fellowship as well as research on therapeutic endoscopy outcomes. Dr. Tielleman is a member of the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy. Personal Note During his free time, Dr. Tielleman enjoys cooking, traveling, and spending time with his family. Education Medical School UT Southwestern Medical School (2014) Residency UT Southwestern Medical Center (2017), Internal Medicine Fellowship UT Southwestern Medical Center (2020), Gastroenterology Fellowship UT Southwestern Medical Center (2021), Advanced Endoscopy Research Interest Hepatobiliary Disorders Therapeutic Endoscopy Publications Next-generation sequencing improves the detection of malignant biliary strictures and changes management Bardhi O, Jones A, Ellis D, Tielleman T, Tavakkoli A, Vanderveldt D, Goldschmiedt M, Singhi A, Kubiliun N, Sawas T Gastrointestinal endoscopy 2025 Jul 102 56-63.e1 Glucagon-Like Peptide Receptor Agonists Use before Endoscopy Is Associated with Low Retained Gastric Contents: A Multicenter Cross-Sectional Analysis Phan J, Chang P, Issa D, Turner R, Dodge J, Westanmo A, Karna R, Olive L, Bahdi F, Aldzhyan V, Bilal M, Tielleman T American Journal of Gastroenterology 2025 Mar 120 554-561 How I do It: Zenker's Per Oral Endoscopic Myotomy with Partial Mucosal Septum Division Modification Dhar SI, Goldschmiedt M, Tielleman T Laryngoscope 2025 Mar 135 1029-1033 Double-balloon enteroscopy retrieval of dislodged lumen-apposing metal stent Turner RC, Valencia J, Vemulapalli R, Tielleman T Gastrointestinal endoscopy 2025 Feb 101 479-480 Endoscopic Transpapillary Gallbladder Drainage With 2 Stents Versus 1 Stent Reduces Reinterventions: A Multicenter Study Haddad JD, Wilson N, Are VS, Shah SL, Issa D, Sawas T, Bilal M, Tielleman T Techniques and Innovations in Gastrointestinal Endoscopy 2025 Jan 27 TWO RARE CONDITIONS IN ONE: A CASE OF GALLBLADDER AGENESIS IN A PATIENT WITH TYPE I CHOLEDOCHAL CYST Turner R, Ethun C, Tielleman T American Journal of Gastroenterology 2025 Liver transplant bile duct suture leading to acute cholangitis: endoscopic removal via cholangioscopy Thyssen E, Vagefi P, Mufti A, Tielleman T Endoscopy 2024 Apr 56 E319-E320 Endoscopic repair of surgically transected bile duct using overlapping covered metal stents Tielleman T, Goldschmiedt M VideoGIE 2024 Feb 9 84-87 EUS-guided coil injection therapy in the management of gastric varices: the first U.S. multicenter experience (with video) Bazarbashi AN, Aby ES, Mallery JS, El Chafic AH, Wang TJ, Kouanda A, Arain M, Lew D, Gaddam S, Mulki R, Kabir Baig KK, Satyavada S, Chak A, Faulx A, Glessing B, Evans G, Schulman AR, Haddad J, Tielleman T, Hollander T, Kushnir V, Shah J, Ryou M Gastrointestinal endoscopy 2024 Jan 99 31-37 Structured training program on confocal laser endomicroscopy for pancreatic cystic lesions: a multicenter prospective study among early-career endosonographers (with video) Machicado JD, Napoleon B, Akshintala V, Bazarbashi AN, Bilal M, Corral JE, Dugum M, Han S, Hussain FS, Johnson AM, Jovani M, Kolb JM, Leonor P, Lee PJ, Mulki R, Shah H, Singh H, Sánchez-Luna SA, Shah SL, Singla A, Vargas EJ, Tielleman T, Nikahd M, Fry M, Culp S, Krishna SG Gastrointestinal endoscopy 2023 Dec 98 953-964 Results 1-10 of 16 1 2 Next Last Books Featured Books Epidemiology and Risk Factors for Upper Gastrointestinal Bleeding. In Clinics Review Articles: Upper Gastrointestinal Bleeding Management Tielleman, T., Bujanda, D. and Cryer, B. (2015). Honors & Awards 1st Place, Gold MedalAmerican Society of Gastrointestinal Endoscopy World Cup of Endoscopy (2022) Housestaff Officer of ExcellenceUT Southwestern Internal Medicine Residency (2016) Internal Medicine Teaching AwardUT Southwestern (0) Professional Associations/Affiliations Alpha Omega Alpha American College of Gastroenterology American Gastroenterological Association American Society of Gastrointestinal Endoscopy
