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Abdominal aortic aneurysm
Absence seizure
Acanthosis nigricans
Achalasia
Achilles tendinitis
Achilles tendon rupture
ACL injury
Acne
Acoustic neuroma
Acromegaly
Actinic keratosis
Acute coronary syndrome
Acute kidney failure
Acute liver failure
Acute lymphocytic leukemia
Acute myelogenous leukemia (AML)
Acute sinusitis
Addison’s disease
Adenomyosis
ADHD in children
Adjustment disorders
Adnexal tumors
Adrenal cancer
Adrenoleukodystrophy
Adult ADHD
Adult Still’s disease
Age spots (liver spots)
Agoraphobia
Airplane ear
Albinism
Alcohol intolerance
Alcohol poisoning
Alcohol use disorder
Alcoholic hepatitis
Allergies
Alzheimer’s disease
Ambiguous genitalia
Ameloblastoma
Amenorrhea
Amnesia
Amniotic fluid embolism
Ampullary cancer
Amyloidosis
Amyotrophic lateral sclerosis
Anal cancer
Anal fissure
Anal fistula
Anal itching
Anaphylaxis
Anemia
Aneurysms
Angelman syndrome
Angina
Anhidrosis
Ankylosing spondylitis
Anorexia nervosa
Anorgasmia
Anterior prolapse (cystocele)
Anthrax
Antibiotic-associated diarrhea
Antiphospholipid syndrome
Antisocial personality disorder
Anxiety
Aortic dissection
Aortic valve disease
Aortic valve regurgitation
Aortic valve stenosis
Aphasia
Aplastic anemia
Appendicitis
ARDS
Arteriosclerosis / atherosclerosis
Arteriovenous fistula
Arteriovenous malformation
Arthritis
Asbestosis
Ascariasis
Aspergillosis
Asthma
Asthma attack
Astigmatism
Ataxia
Atelectasis
Athlete’s foot
Atopic dermatitis (eczema)
Atrial fibrillation
Atrial flutter
Atrial septal defect
Atrioventricular canal defect
Atypical depression
Atypical hyperplasia of the breast
Autism spectrum disorder
Autoimmune hepatitis
Autoimmune pancreatitis
Autonomic neuropathy
Avascular necrosis