Gallstones are crystal-like masses that typically form in the gallbladder. The gallbladder is a small organ located on the right side of the abdomen,

Gangrene is the death of tissue in your body. It develops when the blood supply to an affected body part is cut off because

Gastroenteritis literally means inflammation of the gastrointestinal tract. Viral gastroenteritis is also called “stomach flu.” It is extremely common, especially in children, and is

Genital herpes is a common sexually transmitted infection (STI; also known by the older term sexually transmitted disease or STD) in North America and

GERD stands for gastroesophageal reflux disease, which is the backflow of stomach contents (including stomach acid) upward into the esophagus (the swallowing tube that

Giant cell arteritis (GCA) is a common inflammation disease of medium- to large-sized arteries. These arteries can become narrowed, restricting blood flow to affected

Giardiasis is an intestinal infection caused by a microscopic, single-celled parasite known as Giardia lamblia. A parasite is an organism that lives on or

Gingivitis is an inflammation of the gums (known to doctors as the gingiva) caused by bacteria. Eventually the bacteria can get into the bones

Glaucoma is a type of progressive eye damage in which optic nerve cells are damaged by excess fluid pressure in the eyeball. It’s the

Each year, approximately 3,000 Canadians are diagnosed with brain tumours. A glioma is a type of malignant brain tumour. A malignant tumour is a

Glomerulonephritis is a progressive kidney disease that involves the glomeruli, the individual filtering units of the kidney that produce urine. When the glomeruli become

Gonorrhea is one of the most common sexually transmitted infections in North America. Gonorrhea is caused by the bacterium Neisseria gonorrhoeae. The infection can

Gout is a type of arthritis that is characterized by sudden, severe attacks of joint pain with tenderness, redness, warmth, and swelling in the

Guillain-Barré syndrome (GBS) is a rare neurological disorder which causes progressive paralysis, starting from the feet and progressing up throughout the rest of the