An antinuclear antibody (ANA) test is performed to determine or confirm the presence of antinuclear antibodies in an individual’s bloodstream. A minimal amount of antinuclear antibodies in the body is normal.

Alopecia areata is a type of hair loss that can occur in tiny patches or on the entire scalp when the immune system destroys hair follicles. Although this illness can affect anyone at any age, teenagers and young adults are the most frequently affected.

Antiphospholipid syndrome (APS) affects the blood’s clotting process. It causes abnormal blood clots to form in the blood vessels, resulting in thrombophilia. Unfortunately, the condition is often underdiagnosed despite its life-threatening consequences.

Avascular necrosis is a disorder that occurs when a bone’s blood supply is cut off permanently or temporarily. The bone collapses when it does not receive sufficient blood to function.

Alzheimer’s disease is a form of dementia that causes memory, reasoning, learning, and organizing abilities to decrease over time. Individuals with this condition are often older than 65. There is no known cure for Alzheimer’s; however, several treatments and therapies can help temporarily manage symptoms.

Aseptic necrosis is when a bone’s blood supply is cut off, leading to the death of the bone tissue. The condition is also called ischemic bone necrosis, avascular necrosis, and osteonecrosis.

Asperger’s syndrome (AS) is a neurodevelopmental condition that affects communication and socialization skills. Obsessive interests, formal speech, rituals, social isolation, delay in motor skills, lack of imagination, and sensory difficulties characterize the condition.

Atrial flutter is a health condition characterized by abnormal heartbeat or arrhythmia. A rapid electrical circuit in the heart causes the upper chambers (atria) to pump rapidly, impeding the ability of the heart to pump blood effectively.