Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
Upper endoscopy is a procedure that enables the examiner (usually a
gastroenterologist) to examine the esophagus (swallowing tube), stomach, and
duodenum (first portion of small bowel) using a thin, flexible tube called the
upper endoscope through which the lining of the esophagus, stomach, and duodenum can be viewed using a TV monitor.
To accomplish a safe and complete examination, the stomach should be empty. The patient will most likely be asked to have nothing to eat or drink for six hours or more prior to the procedure.
Prior to scheduling the procedure, the patient should inform his or her physician of any medications
being taken, any allergies, and all known health problems. This information will
help the doctor determine whether the patient may need antibiotics prior to the procedure,
and what potential medications should not be used during the exam because of the patient's allergies.
The information will provide the individual scheduling the procedure an opportunity to instruct the patient whether any of the medications should be held or adjusted prior to the endoscopy.
Knowledge whether the patient has any major health problems, such as heart or lung diseases, will alert the
doctor of possible need for special attention during the procedure.
Carcinoid tumors are rare tumors that develop from hormone-producing cells called enterochromaffin cells that occur throughout the body with approximately 65% originating in the gastrointestinal tract and 25% "...