The most complete medical information written by the best doctors


Gait analysis

Sports medicine

What is gait analysis? Dynamic gait analysis or footstep analysis is a clinical tool, designed to assess a patient’s balance and fall risk. It examines a person’s gait (the manner in which a person walks) as they walk normally and walk during more challenging tasks.

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Gallbladder surgery

Surgery, Paediatric surgery, Colorectal surgery

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...

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Surgery, Nephrology, Urology, Gastroenterology, Colorectal surgery, Hepatology (liver specialist)

What are gallstones? Gallstones arehard lumps or stones, usually made of cholesterol or sometimes other substances like bilirubin that form in the gallbladder. These stonesdevelop graduallyover 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 casesonly one stone will...

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Gambling addiction

Psychology, Psychiatry

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.

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Gamma knife

Neurosurgery, Radiology

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...

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Radiology, Nuclear medicine, Interventional radiology

What is gammagraphy? Gammagraphy is an imaging technique that forms the basis of nuclear medicine. It uses special cameras that detect gamma rays to capture images of the inside of the patient’s body by tracing radioactive materials administered by the doctor as they pass through the body.

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Ganglion cyst

Orthopaedic surgery, Surgery, Plastic surgery, Paediatric orthopaedics

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.

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Vascular surgery

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...

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Gas permeable contact lenses


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...

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Gastric balloon

Gastroenterology, Surgery

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...

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