Gastroenterology

Gastroenterology is the branch of internal medicine that handles the diagnosis and non-surgical treatment of disorders of the whole digestive tract, together with the liver, gallbladder, bile ducts and pancreas. The doctors who specialise in it are gastroenterologists, and many work closely with hepatologists, who concentrate on the liver. The digestive system breaks food down, absorbs nutrients and clears waste, so when it is disturbed the symptoms can be very different from one person to another, ranging from pain and reflux to bleeding, jaundice or weight loss. A core strength of the field is that the same flexible endoscope used to look inside the gut can also treat what it finds, so diagnosis and therapy often happen in a single step. Alongside this, gastroenterology has a strong preventive role, because screening can detect bowel cancer and other serious disease before any symptom appears.

The conditions seen in a digestive clinic span the whole tract. In the upper gut these include reflux and heartburn, gastritis, peptic ulcer, indigestion and difficulty swallowing. The small and large bowel bring coeliac disease, irritable bowel syndrome, the inflammatory bowel diseases Crohn's disease and ulcerative colitis, diverticular disease, polyps and colorectal cancer. Hepatology covers fatty liver, viral hepatitis, cirrhosis and the long-term follow-up that some patients need before or after a liver transplant. The pancreas and biliary system bring gallstones, blocked bile ducts, acute and chronic pancreatitis and tumours of the pancreas and bile ducts. Therapeutic endoscopy is a sub-specialty in its own right, dedicated to treating bleeding, removing large polyps, placing stents and clearing the bile ducts without surgery.

Treatment is matched to the condition and ranges from medication and nutrition to advanced endoscopic therapy. Reflux and ulcer disease are usually controlled with acid-reducing medication and lifestyle change, and the bacterium behind many ulcers can be cleared with a short course of treatment. Inflammatory bowel disease is managed with anti-inflammatory, immune-modulating and biologic medicines, with colonoscopy used to confirm the diagnosis and follow the response. A great deal is done through the endoscope itself: removing polyps before they can turn into cancer, stopping a bleeding ulcer, stretching a narrowed esophagus, placing a stent across a blockage and clearing stones from the bile duct during ERCP. When an operation is the better option, for example for gallbladder disease or a tumour, the gastroenterology team works hand in hand with surgical and oncology colleagues so the patient follows one coordinated plan.

Modern digestive medicine relies on direct visualisation supported by imaging and the laboratory. Gastroscopy uses a thin camera to inspect the esophagus, stomach and the first part of the small bowel, while colonoscopy examines the large bowel and allows polyps to be removed at the same time. Endoscopic ultrasound combines a scope with a sound probe to study the pancreas, bile ducts and the wall of the gut in fine detail and to guide precise biopsies. ERCP treats problems of the bile ducts and pancreatic duct from the inside, and MRCP gives a non-invasive map of the same ducts before any procedure. These are supported by ultrasound, CT and MRI, blood tests of liver and pancreas function, stool and breath tests, and tissue analysis of any biopsy. Used together, they let disease be found at an early, more treatable stage, which is why screening colonoscopy is valuable even for people with no symptoms.

For people who travel, care usually begins with a remote review of symptoms and any previous reports, so that the right tests can be arranged for arrival. Most endoscopic procedures are done under light sedation and as a day case, with a few hours of observation before discharge, and several investigations can often be grouped into one short visit to save time. Simple preparation matters: an empty stomach for an upper endoscopy, and bowel cleansing the day before a colonoscopy, all explained in advance. After a routine scope most patients feel well the same day and can fly home within a day or two, while more complex therapeutic procedures such as ERCP or stent placement call for a slightly longer stay so recovery can be confirmed. Interpreter and international patient support is widely available to help with appointments, consent and instructions, and a written report with any biopsy results is provided so that follow-up can continue with a doctor at home.