Gastroenterologist Mouen Khashab specializes in therapeutic endoscopy, and he oversees this group of practitioners across the Johns Hopkins enterprise. Nationally and internationally known in the field of interventional endoscopy, Dr. Khashab has contributed immensely to the field’s advancement as a minimally invasive means to treat gastrointestinal and pancreaticobiliary disorders. Dr. Khashab earned his medical degree from the American University of Beirut Faculty of Medicine, and subsequently completed a residency in internal medicine and a fellowship in gastroenterology at Indiana University. He then completed a two-year fellowship at The Johns Hopkins Hospital before joining the faculty in 2011. A busy researcher, Dr. Khashab has published more than 600 papers in peer-reviewed journals. In 2013, he described the procedure called gastric peroral endoscopic myotomy (known as G-POEM) and was able to disseminate and teach it all over the world. Other procedures that he expanded include peroral endoscopic myotomy (POEM), peroral endoscopic myotomy with fundoplication (POEM-F), Zenker’s peroral endoscopic myotomy (Z-POEM) and full thickness resection. In 2022, he received the Master Endoscopist Award from the American Society for Gastrointestinal Endoscopy (ASGE) for his numerous contributions to the field. His procedural expertise includes endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), interventional EUS, submucosal endoscopy, POEM/achalasia, endoscopic mucosal resection, endoscopic submucosal dissection, luminal stenting, large polyp resection and Barrett’s therapy, among others. Dr. Khashab is involved with multiple gastrointestinal societies and has served on many committees, including the ASGE Standards of Practice Committee, which is in charge of formulating guidelines for the practice of endoscopy. He has also served as an associate editor for the journal Endoscopy, a premier journal in the field. Khashab is a highly sought-after speaker at national and international conferences, and he has participated in multiple live endoscopy conferences. Outside of academic medicine, Dr. Khashab is an entrepreneur. His major interest is in new technology and medical devices, and his goal is to disrupt the field by introducing technology that makes endoscopic procedures safer, easier, efficient and more scalable. Dr. Khashab is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Achalasia, Pancreatic Pseudocyst, Bile Duct Obstruction, Endoscopy, and Gastric Bypass.

Gastroenterologist Saowanee Ngamruengphong specializes in the endoscopic diagnosis and management of gastrointestinal malignancies, premalignant and malignant lesions in the gastrointestinal tract (e.g., early gastric cancer, Barrett's esophagus-associated neoplasia), esophageal cancer, colon polyps or early colorectal cancer, and pancreatic and biliary disease. Dr. Ngamruengphong earned a medical degree from Chulalongkorn University and completed residency training at the Texas Tech University Health Sciences Center. She undertook fellowship training in gastroenterology at the Mayo School of Graduate Medical Education and further fellowship training in therapeutic endoscopy at The Johns Hopkins Hospital. Her research interests include endoscopic resection and the management of precancerous or cancerous gastrointestinal lesions. Dr. Ngamruengphong is a member of several professional organizations, including the Thai Medical Council, the American College of Gastroenterology and the American Gastroenterological Association. Videos Endoscopic Submucosal Dissection (ESD) — Eileen’s Story Recent News Articles and Media Coverage A Rare, Stomach-Saving Endoscopic Procedure, Inside Tract (Spring 2021) Case Presentation: ESD-TAMIS, Inside Tract (Spring 2019) Innovative Approaches to Colorectal Surgery Benefit Patients, Surgery (Winter 2019) For Colorectal Polyps: Early Detection and Minimally Invasive Endoscopic Resection, Inside Tract (Winter, 2019) The Cutting Edge of Endoscopic Resection, Inside Tract (Spring, 2017) Stomach Cancer: Know Your Risks & Treatment Options, Johns Hopkins Surgery (4/26/2017). Dr. Ngamruengphong is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. Her top areas of expertise are Achalasia, Pancreatic Pseudocyst, Stomach Cancer, Endoscopy, and Gastric Bypass.

Daniel Rhee, M.D., M.P.H., joins the Johns Hopkins Department of Surgery as Assistant Professor of Surgery and Director of the Pediatric Surgical Oncology Program. Dr. Rhee’s areas of clinical expertise include pediatric surgical oncology as well as neonatal and general pediatric surgery. Dr. Rhee received his undergraduate degree from the University of Michigan and earned his medical degree from The Ohio State University College of Medicine. He completed his residency in general surgery at St. Joseph Mercy Hospital before completing fellowships at Johns Hopkins Hospital in Pediatric Surgery and Memorial Sloan Kettering Cancer Center in Pediatric Surgical Oncology. Dr. Rhee is a member of several professional societies, including the American College of Surgeons, American Pediatric Surgical Association, the Association of Academic Surgeons, the Children’s Oncology Group, and The International Society of Paediatric Surgical Oncology. Dr. Rhee’s research interests involve childhood tumors including neuroblastoma, sarcoma, Wilms tumor, hepatoblastoma, pancreatoblastoma, reconstruction for chest wall tumors, germ cell tumors, and desmoplastic small round cell tumors. His research interests also include use of 3D printing for simulation for surgical training, improving surgical outcomes in pediatric surgery and improving access to surgical care in low and middle-income countries. Dr. Rhee is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Adult Soft Tissue Sarcoma, Appendicitis, Tracheoesophageal Fistula, Appendectomy, and Pancreaticoduodenectomy.

Samuel Alaish is a General Surgeon in Baltimore, Maryland. Dr. Alaish is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Short Bowel Syndrome, Pectus Excavatum, Esophageal Atresia, and Gastroschisis.

Dr. Wikrom Karnsakul is an associate professor of pediatrics at the Johns Hopkins University School of Medicine. His clinical interests are in the care of pediatric liver diseases, and general gastrointestinal diseases. Dr. Karnsakul received his medical degree in 1992 from Faculty of Medicine, Siriraj Medical Center, Mahidol University School of Medicine in Bangkok, Thailand. He completed his residency in pediatrics at Advocate Hope Children's Hospital in 1998 and did a fellowship in pediatric gastroenterology, hepatology and nutrition at Texas Children's Hospital, Baylor College of Medicine in Houston, Texas. He completed his postdoctoral research training at USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine. He joined the faculty at Johns Hopkins in 2008. His research interests center on the understanding and treatment of chronic liver disease, ascites, cholestasis, viral hepatitis especially hepatitis C and hepatitis E, and Cystic Fibrosis Related Liver Disease. Dr. Karnsakul is also involved in NIH-funded multicenter research studies including the Cholestatic Liver Disease Consortium and Cystic Fibrosis Related Liver Disease Project. Dr. Karnsakul is currently a Fellow of the American Association for the Study of Liver Diseases (FAASLD). Dr. Karnsakul is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Alagille Syndrome, Cholestasis, Hepatitis E, Liver Transplant, and Endoscopy.

John Affronti is a Gastroenterologist in Baltimore, Maryland. Dr. Affronti is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Childhood Volvulus, Portal Hypertension, Indigestion, Endoscopy, and Gastrectomy.

Khyzer Aziz is a neonatologist at Johns Hopkins Children’s Center in Baltimore, Maryland, specializing in the diagnosis and treatment of premature babies or newborns with high-risk or complex health conditions. Dr. Aziz is also an assistant professor of pediatrics and general internal medicine at the Johns Hopkins University School of Medicine. He began his academic journey at the University of Florida College of Medicine. Later, he received training at the Jacobi Medical Center in New York, and completed a fellowship in pediatrics at the Johns Hopkins University School of Medicine, before officially joining the faculty in 2020. In addition to being a neonatologist, Dr. Aziz is highly innovative and skilled in the latest medical and technological advances. He is director of the Johns Hopkins NICU Precision Medicine Center of Excellence, associate director of the Master of Science in Applied Health Sciences Informatics Programs in Biomedical Informatics and Data Science, and is the chief medical information officer (CMIO) for Johns Hopkins Children’s Center. Dr. Aziz is a designated researcher for the Johns Hopkins AI-X Foundry, an organization that provides the framework and support infrastructure for artificial intelligence and data science efforts across the Johns Hopkins institutions. Along with his expertise in machine learning, data science and ethics, he is a member of the Johns Hopkins Medicine Artificial Intelligence Task Force. As the CMIO for Johns Hopkins Children’s Center, Dr. Aziz focuses on using emerging technologies, such as generative AI, in health care to help transform how high-quality, cutting-edge care is delivered to patients and their families in today’s increasingly digital world. Dr. Aziz is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Intraventricular Hemorrhage of the Newborn, Premature Infant, Gastroschisis, and Childhood Volvulus.

Lena Naffaa is a Pediatric Radiologist in Baltimore, Maryland. Dr. Naffaa is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. Her top areas of expertise are Infantile Pyloric Stenosis, Increased Head Circumference, Pneumomediastinum, Testicular Torsion, and Fasciotomy.

Allen Banegura is a Gastroenterologist in Catonsville, Maryland. Dr. Banegura is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Familial Adenomatous Polyposis, Angiodysplasia of the Colon, Esophagitis, Gastrectomy, and Colonoscopy.

Thomas Abernathy is a Gastroenterologist in Catonsville, Maryland. Dr. Abernathy is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Lactose Intolerance, Familial Adenomatous Polyposis, Hemorrhoids, Gastrectomy, and Colonoscopy.

Dr. Onwueme graduated with Distinction from Yale University with dual BSc/MSc degrees in chemistry and received MD and PhD degrees from Weill Cornell Medical College. He completed his Internal Medicine residency at Brigham and Women’s Hospital (Clinical Fellow Harvard Medical School) and his Gastroenterology fellowship at Johns Hopkins University School of Medicine. He is currently the Director of clinical trials at Woodholme Gastroenterology and has an ardent interest in the role of microbial metabolites in gut diseases. Dr. Onwueme prizes commitment to quality and compassionate patient care to which he devotes his practice. He has expert knowledge in gut microbiology and a special interest in diarrheal diseases, disordered gut motility, autoimmune and inflammatory bowel disease. Dr. Onwueme is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Gastric Dysmotility, Diverticular Disease, Diarrhea, Endoscopy, and Gastrectomy.

Agazi Gebreselassie is a Gastroenterologist and a Hospital Medicine provider in Baltimore, Maryland. Dr. Gebreselassie is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Jaundice, Macroamylasemia, Portal Hypertension, Endoscopy, and Colonoscopy.

Steven Epstein is a Gastroenterologist in Baltimore, Maryland. Dr. Epstein is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Familial Adenomatous Polyposis, Attenuated Familial Adenomatous Polyposis, Cronkhite-Canada Disease, Gastrectomy, and Colonoscopy.

April Tignor is a Gastroenterologist in Glen Burnie, Maryland. Dr. Tignor is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. Her top areas of expertise are Hemorrhoids, Indigestion, Gastritis, Endoscopy, and Gastrectomy.

Loc Le is a Gastroenterologist in Baltimore, Maryland. Dr. Le is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome (IBS), Barrett Esophagus, Colonoscopy, and Endoscopy.

Raymond Cross is a Gastroenterologist in Baltimore, Maryland. Dr. Cross is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Viral Gastroenteritis, Endoscopy, and Colonoscopy.

Peter Darwin is a Gastroenterologist in Baltimore, Maryland. Dr. Darwin is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Cholestasis, Bile Duct Obstruction, Bile Duct Stricture, Endoscopy, and Pancreatectomy.

Bruce Greenwald is a Gastroenterologist in Baltimore, Maryland. Dr. Greenwald is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Barrett Esophagus, Esophageal Cancer, Benign Esophageal Stricture, Endoscopy, and Colonoscopy.

Edward Wolf is a Gastroenterologist in Baltimore, Maryland. Dr. Wolf is rated as an Advanced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Diverticular Disease, Gastroesophageal Reflux Disease (GERD), Barrett Esophagus, Colonoscopy, and Gastrectomy.

Ernest Tsao is a Gastroenterologist in Baltimore, Maryland. Dr. Tsao is rated as an Experienced provider by MediFind in the treatment of Childhood Volvulus. His top areas of expertise are Hepatitis, Gas Bloat Syndrome, Hepatitis C, Endoscopy, and Gastrectomy.