Cholesterol is a waxy substance found in the blood. The body needs cholesterol to build healthy cells. But high levels of cholesterol can...

Hashimoto's disease is an autoimmune disorder affecting the thyroid gland. The thyroid is a butterfly-shaped gland located at the base of...

Graves' disease is an immune system condition that affects the thyroid gland. It causes the body to make too much thyroid hormone. That...

A goiter (GOI-tur) is the irregular growth of the thyroid gland. The thyroid is a butterfly-shaped gland located at the base of the neck...

Gestational diabetes is diabetes diagnosed for the first time during pregnancy (gestation). Like other types of diabetes, gestational...

Gender dysphoria is a feeling of distress that can happen when a person's gender identity differs from the sex assigned at birth. Some...

Galactorrhea (guh-lack-toe-REE-uh) is a milky nipple discharge not linked to the making of milk for breastfeeding. Galactorrhea isn't a...

Erectile dysfunction means not being able to get and keep an erection firm enough for sexual activity. It also is called impotence....

End-stage renal disease, also called end-stage kidney disease or kidney failure, occurs when chronic kidney disease — the gradual loss of...

Diabetes mellitus refers to a group of diseases that affect how the body uses blood sugar (glucose). Glucose is an important source of...

Cystic fibrosis (CF) is a condition passed down in families that causes damage to the lungs, digestive system and other organs in the...

Cushing syndrome happens when the body has too much of the hormone cortisol for a long time. This can result from the body making too...

Congenital adrenal hyperplasia (CAH) is the medical name for a group of genetic conditions that affect the adrenal glands. The adrenal...

Chronic kidney disease, also called chronic kidney failure, involves a gradual loss of kidney function. Your kidneys filter wastes and...

Carcinoid tumors are a type of slow-growing cancer that can arise in several places throughout your body. Carcinoid tumors, which are one...

Cancer refers to any one of a large number of diseases characterized by the development of abnormal cells that divide uncontrollably and...

Benign adrenal tumors are masses that aren't cancer. They form in the adrenal glands. The adrenal glands are part of the endocrine...

Adrenoleukodystrophy (uh-dree-noh-loo-koh-DIS-truh-fee) is a type of hereditary (genetic) condition that damages the membrane (myelin...

Adrenal cancer is a growth of cells that starts in an adrenal gland. The adrenal glands are small, triangular glands located on top of...

Addison's disease is a rare condition that happens when the body doesn't make enough of some hormones. Another name for Addison's disease...