Medical dictionary

What is gallbladder surgery?Gallbladder surgery is a surgical procedure that is performed to remove the gallbladder, an organ located in the lower part of the liver that serves as a reserve for bile.  Why is gallbladder surgery performed?Gallbladder surgery is performed when the patient is experiencing pain or presenting with symptoms caused by the formation of calculi (stones) in the ga

What are gallstones?   Gallstones are hard lumps or stones, usually made of cholesterol or sometimes other substances like bilirubin that form in the gallbladder. These stones develop gradually over several years and can be as small as a grain of sand or as big as a pebble. There are usually several stones present at once, however, in some cases only one stone will f

What is a gambling addiction? Problem gambling, compulsive gambling, or gambling addiction is an urge to gamble with no need felt to stop, or disregarding any type of negative consequence as a result of the habit. Problem gambling can be destructive and can lead to job loss, debt, fraud, crime or problems in family relationships. What are the symptoms of compulsive gambling? The most

What is being analysed? Gamma-glutamyl transferase (GGT) is an enzyme found in various tissues throughout the body, with particularly high concentrations in the liver. It plays a crucial role in the metabolism of glutathione, a key antioxidant, and in the transport of amino acids across cell membranes. What does the result mean? Elevated levels of GGT in the blood can indicate liver d

What is a gamma knife? A gamma knife is not, in fact, a physical ‘knife’ in the traditional sense of the word, but is a precise form of radiation therapy used to treat tumours, malformations, or nerves causing problems in the brain. Gamma knife surgery is performed by a specialist neurosurgeon. Why is gamma knife surgery performed? Gamma knife surgery is also not &lsquo

What is a ganglion cyst? A ganglion cyst is a benign but painful growth, usually on the hand or wrist. The pain often comes on at night, or after constant use of the hand. Ganglion cysts can vary in size, growing up to three centimetres wide. While the position of the cyst doesn’t tend to change, the size may fluctuate over time, and some go away entirely without treatment. Can

What is gangrene? Gangrene is tissue death caused by a loss of blood supply, and therefore a lack of oxygen. It is most common in the hands and feet, although muscles and internal organs can become gangrenous as well. Individuals with diabetes, atherosclerosis and other blood vessel disorders have a higher risk of gangrene. Gangrene can be classified into: Dry gangrene – assoc

What are gas permeable contact lenses? Gas permeable contact lenses, or GP contact lenses, are rigid contact lenses made of a hard material that is oxygen-permeable. Hence, GP contact lenses are also known as rigid gas permeable (RGP) contact lenses. They provide an alternative option to soft contact lenses which are commonly chosen by many people. GP contact lenses are made of a plastic mat

What is the gastric balloon?A gastric balloon is a silicone device of a spherical shape that is introduced into the stomach of patients struggling with obesity. By doing so, patients do not feel the need to eat as much and feel full for longer. This can help such patients to lose weight. It is the most effective solution to fight obesity without the need for invasive surgery.Why have a gastric b