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Accessory Breast
Accessory breast tissue is extra breast tissue that develops along the embryonic milk line, which runs from the armpit toward the groin.…
Achalasia
Achalasia is a rare swallowing disorder in which the esophagus has trouble moving food down into the stomach. The lower esophageal sphincter,…
Acne Scarring Treatment
Acne scarring is a lasting change in the skin after acne heals. Scars may be raised or indented, while temporary red or…
Acromegaly
Acromegaly is a rare hormone disorder in which the body produces too much growth hormone. In most cases, the excess hormone comes…
Actinomycetoma
Actinomycetoma is a chronic infection of the skin and tissues beneath it caused by filamentous bacteria. It usually begins when bacteria from…
Actinomycosis
Actinomycosis is an uncommon, slow-growing bacterial infection caused by Actinomyces bacteria. These bacteria normally live in the mouth and in the digestive…
Acute Rheumatic Fever
Acute rheumatic fever is an inflammatory immune reaction that can occur after an untreated or inadequately treated group A streptococcal infection of…
Addison Disease
Addison disease is a rare condition in which damaged or poorly functioning adrenal glands do not make enough cortisol and often do…
Allergic Asthma
Allergic asthma is a type of asthma in which an immune response to an allergen causes the airways to become inflamed and…
Als Disease
ALS disease, or amyotrophic lateral sclerosis, is a progressive neurological condition also known as Lou Gehrig's disease. It damages motor neurons, the…
Alzheimer Disease
Alzheimer disease is a progressive brain disorder that gradually affects memory, thinking, language, and the ability to manage everyday activities. It is…
Anemia
Anemia is a condition in which the blood does not carry enough oxygen to the body's tissues. This often happens when there…
Angina
Angina is temporary chest discomfort that happens when the heart muscle does not receive enough oxygen-rich blood. This reduced blood flow is…
Ankylosing Spondylitis
Ankylosing spondylitis is a chronic inflammatory form of spondylitis that mainly affects the spine and the sacroiliac joints, where the lower spine…
Aortic Aneurysm
An aortic aneurysm is a weakened, bulging area in the aorta, the body's largest artery. It can develop in the chest, where…
Aortic Diseases
Aortic diseases are a group of conditions that affect the aorta, the body’s largest artery, which carries blood from the heart through…
Aphasia
Aphasia is a language disorder caused by damage to parts of the brain that process communication. It can affect speaking, understanding spoken…
Aplastic Anemia
Aplastic anemia is a rare bone marrow failure disorder in which the bone marrow makes too few red blood cells, white blood…
Appendicitis
Appendicitis is inflammation of the appendix, a small, finger-shaped pouch attached to the large intestine. It can affect people of any age,…
Arthritis
Arthritis is a broad term for more than 100 diseases and conditions that affect the joints. It can cause pain, stiffness, swelling,…
Autism
Autism is a lifelong neurodevelopmental condition that affects how a person communicates, interacts, learns, or experiences sensory information. It is often described…
Autoimmune Hepatitis
Autoimmune hepatitis is a long-term liver disease in which the immune system mistakenly attacks healthy liver cells. This immune attack causes inflammation…
Autonomic Neuropathy
Autonomic neuropathy is damage to the autonomic nerves, which control body functions that usually happen without conscious effort. These autonomic functions include…
Bejel
Bejel is a chronic infectious disease caused by Treponema pallidum subsp. endemicum, a bacterium related to the one that causes syphilis. It…
