Endorectal MRI: An MRI (magnetic resonance imaging) done from inside the rectum. To do such as MRI, a surface coil within an inflated latex balloon can be positioned in the rectum. The MRI is read (interpreted) and specific areas of suspicion are identified. The MRI data can be mapped onto a 3-dimensional model to determine strategy.
Screening for prostate cancer is plagued by some unresolved problems. One is what to do when a man is found to have a high level of PSA (prostate-specific antigen), has a biopsy of his prostate, and the biopsy shows no sign of a tumor that might be responsible for the rise in PSA. Endorectal MRI may help in this situation since localizing prostate tumors with MRI appears more accurate than localizing such tumors with ultrasound. (Reference: J Urology 1999;162:1314-1317.)
Endorphin: A hormonal compound that is made by the body in response to pain or extreme physical exertion. Endorphins are similar in structure and effect to opiate drugs. They are responsible for the so-called runner’s high, and release of these essential compounds permits humans to endure childbirth, accidents, and strenuous everyday activities.
Endoscope: A lighted optical instrument that is used to get a deep look inside the body. An endoscope, which may be rigid or flexible, can be used to examine organs, such as the throat or esophagus. Specialized endoscopes are named for where they are intended to look. Examples include the cystoscope (bladder), nephroscope (kidney), bronchoscope […]
- Endoscopic gastrostomy, percutaneous (PEG)
Endoscopic gastrostomy, percutaneous (PEG): A surgical procedure for placing a feeding tube without having to perform an open laparotomy (operation on the abdomen). The aim of PEG is to feed those who cannot swallow. PEG may be done by a surgeon, otolaryngologist (ENT specialist), or gastroenterologist (GI specialist). It is done in a hospital or […]
- Endoscopic retrograde cholangiopancreatography
Endoscopic retrograde cholangiopancreatography: Abbreviated ERCP. A procedure done to diagnose and treat problems in the bile ducts for example gallstones stuck in bile ducts, inflammatory strictures (scars), leaks (from trauma and surgery),bile duct and pancreatic duct cancer. ERCP combines the use of x-rays and an endoscope (a long, flexible, lighted tube). Through it, the physician […]
- Endoscopic sphincterotomy
Endoscopic sphincterotomy: An operation to cut the muscle between the common bile duct and the pancreatic duct. The operation uses a catheter and a wire to remove gallstones or other blockages. Also called endoscopic papillotomy.