Gastroenterology - Special interest

Most people living with non-alcoholic fatty liver disease (NAFLD) are thought to remain undiagnosed and many are asymptomatic. Obesity, hypertension, type 2 diabetes and hyperlipidaemia are risk factors for NAFLD, and NAFLD is considered to be the liver component of metabolic syndrome. Cardiovascular risk should be stratified for all NAFLD patients and any cardiovascular risk factors managed aggressively. Patients should be given lifestyle advice aimed at weight loss and increased physical activity.

In chronic pancreatitis chronic inflammation of the pancreas results in irreversible injury and fibrosis. The most common causal factor is excess alcohol consumption. Smoking is an independent risk factor. Gene mutations can lead to hereditary chronic pancreatitis and idiopathic disease, where no clear cause can be identified, accounts for 20-30% of cases. The typical presenting symptom is intermittent or continuous upper abdominal pain which may radiate to the back. The pain is commonly triggered or exacerbated by eating or alcohol consumption.

Gallstones affect around 15% of adults in the UK. Between 50 and 70% of patients with gallstones are asymptomatic at diagnosis and only 10-25% of these individuals will go on to develop symptomatic gallstone disease. The vast majority (90-95%) of gallstones are cholesterol stones. Obesity is associated with an increased risk of symptomatic gallstones. Patients with symptoms suggestive of gallstones should be offered liver function tests and an abdominal ultrasound.

Inflammatory bowel disease (IBD) is a chronic inflammatory condition which runs a relapsing and remitting course. Ulcerative colitis (UC) is more common than Crohn’s disease (CD). UC almost always affects the rectum and extends proximally and continuously to the colon to a variable extent. CD most commonly affects the terminal ileum or colon but can affect any part of the gastrointestinal tract from the mouth to the anus. The vast majority (90%) of people with UC report bloody stools compared with less than 50% of those with CD. CD is characterised by a triad of abdominal pain, diarrhoea and weight loss.

Colorectal cancer is the fourth most common cancer in the UK and is the second most common cause of cancer deaths. Most cancers are thought to develop from colonic adenomas and incidence is strongly related to age. The majority of cancers are left sided and typically present with a change in bowel habit, blood in the stool or colicky abdominal pain. Rectal cancers can present with fresh red bleeding and large tumours can cause tenesmus (the intense and frequent desire to defecate, with little or no stool passed). Right-sided cancers most often present with anaemia. In both right- and left-sided cancers occasionally the patient may notice an abdominal mass or inexplicable weight loss.