Learn how this cancer differs from other lymphomas. Find out about risk factors and treatments, such as chemotherapy, radiation and bone marrow transplant.
Disease
Huntington's disease
This rare disease causes an early decay of nerve cells in the brain. Learn about its symptoms and how treatments may help.
Disease
Hyperglycemia in diabetes
Hyperglycemia in diabetes can occur for many reasons. Know the causes, symptoms and treatments of high blood sugar and when to get emergency help.
Disease
IgA nephropathy (Berger disease)
This disease causes kidney inflammation that, over time, can interfere with the kidneys' ability to filter waste from the blood.
Disease
Illness anxiety disorder
Excessive worry that you're seriously ill based on minor symptoms can result in major emotional distress and disrupt your life. Also called hypochondria.
Disease
Infectious diseases
Viruses, bacteria, fungi and parasites all can cause infections. Find out more about how to prevent and treat these conditions.
Disease
Inflammatory bowel disease (IBD)
Long-lasting diarrhea and belly pain could be caused by inflammatory bowel disease, also called IBD. Learn about IBD causes, diagnosis and treatment.
Disease
Inherited metabolic disorders
Caused by gene changes, these disorders affect the body's ability to change food into energy. They also affect how energy is used, such as for cell repair.
Disease
Intermittent explosive disorder
This mental health condition involves sudden bouts of impulsive, aggressive, violent behavior or verbal outbursts that cause major distress in life.
Disease
Interstitial lung disease
This group of lung diseases cause progressive lung tissue scarring and affect your ability to breathe and get enough oxygen into your bloodstream.
Disease
Iron deficiency anemia
Iron deficiency anemia — Comprehensive overview covers symptoms, causes, treatment of this blood disorder.
Disease
Jet lag disorder
Jetting across time zones can take a toll on your body's internal clock. Find out how to cope with fatigue and other symptoms while traveling.