The risk for ovarian cancer and skin cancer is increased with basal cell nevus syndrome, a rare genetic disorder.

Gallstones are lumps of solid material that form in your gallbladder. They are made when the digestive juice called bile gets hard and stone-like. Gallstones can be as small as a grain of sand or as big as a golf ball. Your gallbladder may form 1 large stone, hundreds of tiny stones, or both sizes at the same time.

Everyone has gas. It may be painful and embarrassing, but it is not dangerous. Your body gets rid of gas by burping or by passing it through your rectum. Most people make about 1 to 4 pints of gas a day. It is common to pass gas about 14 times a day.

Gastric restrictive surgery is a type of bariatric surgery or weight loss surgery. It limits the amount of food you can eat. This surgery may be used to treat severe obesity when diet, exercise, and medicine have failed.

Gastritis is when your stomach lining gets red and swollen (inflamed). Your stomach lining is strong. In most cases acid does not hurt it. But it can get inflamed and irritated if you drink too much alcohol, eat spicy foods, or smoke.

GERD (gastroesophageal reflux disease) is a digestive disorder. It is caused when gastric acid from your stomach flows back up into your esophagus.

Detailed information on gastrointestinal conditions in children

Gastroparesis is a stomach disorder. It happens when your stomach takes too long to empty out food. If food stays in your stomach for too long, it can cause problems.

Detailed information on cancer, including cancer diagnosis, cancer staging, cancer grading, cancer treatment, cancer surgery, radiation therapy, chemotherapy, hormone therapy, immunotherapy, biological therapy, and cancer clinical trials

You may have difficulty eating or lose your appetite during cancer treatment. Try eating small, frequent meals throughout the day. To improve your appetite, don't drink beverages with your meals.

If you tend to worry a lot, even when there’s no reason, you may have generalized anxiety disorder or GAD. Medicine and lifestyle changes can help.

If you have a family history of multiple cases of the same or related types of cancer, you may need genetic counseling. Read on to learn where to find these services and how they can help you.

Testing methods vary from lab to lab and may affect the likelihood that the lab will identify a mutation in the gene if 1 is present. Different lab studies have the ability to find different types of mutations. Accuracy will vary, depending on the type of genetic testing method performed.

Detailed information on the genetics of ovarian cancer, including hereditary breast ovarian cancer syndrome, Peutz-Jeghers syndrome, ovarian cancer and hereditary nonpolyposis colon cancer, and basal cell nevus syndrome (Gorlin syndrome)

Detailed information on genital and urinary conditions in children

Gestational diabetes is a type of diabetes that happens during pregnancy. The symptoms of gestational diabetes usually go away after delivery. But sometimes they do not, or you may develop type 2 diabetes later.

Giardiasis is an infection. It is caused by a parasite called Giardia. It causes diarrhea.

Glaucoma is a health problem where the fluid inside the eye slowly builds up and doesn’t drain correctly. This causes an increase in eye pressure that can ultimately damage the optic nerve. Here's what you need to know.

When the kidneys' filters (glomeruli) become inflamed and scarred it is called glomerulonephritis. The kidneys slowly lose their ability to remove wastes and excess fluid from the blood to make urine.

Glomerulosclerosis is scarring in the tiny blood vessels in the kidneys called the glomeruli. These are the tiny units in the kidneys that filter urine from the blood.