An allergic reaction to meat-based meals had researchers stumped — until they connected the condition to bites from certain ticks.
Disease
Atypical genitalia
In this rare condition, a baby's genitals are not clearly male or female. Genitals may not be fully developed or the baby may have features of more than one sex.
Disease
Chronic granulomatous disease
Learn about this inherited disease, usually diagnosed in childhood, that makes it difficult for your body to fight infections.
Disease
Complicated grief
In complicated grief, painful emotions of loss don't improve with time and are so severe that you have trouble recovering and resuming your own life.
Disease
Compulsive gambling
Also called gambling disorder, compulsive gambling is the uncontrollable urge to keep gambling despite the toll it takes on your life.
Disease
Enlarged breasts in men (gynecomastia)
Learn how an imbalance of the hormones estrogen and testosterone can cause breast tissue swelling in boys or men.
Disease
Focal segmental glomerulosclerosis (FSGS)
Learn about focal segmental glomerulosclerosis (FSGS), how it's diagnosed and treated.
Disease
Galactorrhea
This type of milky nipple discharge happens to people who aren't breastfeeding. Find out more about what can cause it and how to treat it.
Disease
Gallbladder cancer
Learn about this cancer that begins in the gallbladder. Treatment most often involves surgery. Chemotherapy and radiation therapy may be options.
Disease
Gallstones
Gallstones are hard pieces of material that can form in your gallbladder. Learn about causes and treatment for this sometimes painful digestive disorder.
Disease
Ganglion cyst
These fluid-filled, noncancerous lumps most often appear on wrists, hands or feet.
Disease
Gangrene
A severe bacterial infection or lack of blood flow can cause body tissue to die. Know the warning signs and symptoms of this life-threatening condition.