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Aarskog syndromeAase syndrome
Abdominal aortic aneurysm
ABO incompatibility
Absent pulmonary valve
Acanthosis nigricans
Acetaminophen and codeine overdose
Acetaminophen overdose
Acetone poisoning
Achalasia
Achilles tendinitis
Achondrogenesis
Achondroplasia
Acidosis
Acne
Acoustic neuroma
Acoustic trauma
Acquired platelet function defect
Acrodermatitis
Acrodysostosis
Acromegaly
Actinic keratosis
Actinomycosis
Acute adrenal crisis
Acute arterial occlusion - kidney
Acute bilateral obstructive uropathy
Acute cerebellar ataxia
Acute cholecystitis
Acute cytomegalovirus (CMV) infection
Acute HIV infection
Acute kidney failure
Acute lymphocytic leukemia (ALL)
Acute mountain sickness
Acute myeloid leukemia
Acute nephritic syndrome
Acute pancreatitis
Acute respiratory distress syndrome
Acute tubular necrosis
Acute unilateral obstructive uropathy
Acute upper airway obstruction
Addison's disease
Adenomyosis
Adhesion
Adjustment disorder
Adolescent depression
Adolescent pregnancy
Adrenergic bronchodilator overdose
Adrenocortical carcinoma
Adrenoleukodystrophy
Adult Still's disease
Aftershaves
Agammaglobulinemia
Age-related hearing loss
Agoraphobia
Agranulocytosis
Aicardi syndrome
AIDS
Albinism
Alcohol withdrawal
Alcoholic ketoacidosis
Alcoholic liver disease
Alcoholic neuropathy
Alcoholism
Alkalosis
Alkaptonuria
Allergic conjunctivitis
Allergic reactions
Allergic rhinitis
Allergic vasculitis
Allergies
Allergy to mold - animal dander - dust
Aloe
Alopecia areata
Alpha-1 antitrypsin deficiency
Alport syndrome
Alstrom syndrome
Alzheimer's disease
Amaurosis fugax
Amblyopia
Amebiasis
Amebic liver abscess
Amelogenesis imperfecta
Amenorrhea - primary
Aminophylline overdose
Amitriptyline and perphenazine overdose
Amitriptyline hydrochloride overdose
Ammonia poisoning
Ammonium hydroxide poisoning
Amniotic constriction bands
Amputation - traumatic
Amyotrophic lateral sclerosis
Anal fissure
Analgesic nephropathy
Anaphylaxis
Anaplastic thyroid cancer
Androgen insensitivity syndrome
Anemia
Anemia - B12 deficiency
Anemia of chronic disease
Anencephaly
Aneurysm
Aneurysm in the brain
Angiodysplasia of the colon
Angioedema
Animal bites
Ankylosing spondylitis
Annular pancreas
Anomalous left coronary artery
Anorchia
Anorectal abscess
Anorexia nervosa
Anterior cruciate ligament (ACL) injury
Anterior knee pain
Anthrax
Anti-rust products
Anticoagulant rodenticides poisoning
Antidiarrheal agent overdose
Antifreeze poisoning
Antisocial personality disorder
Aortic arch syndrome
Aortic dissection
Aortic insufficiency
Aortic stenosis
Aortopulmonary window
Apert syndrome
Apnea of prematurity
Appendicitis
Arrhenoblastoma of ovary
Arrhythmias
Arterial embolism
Arterial insufficiency
Arteriovenous malformation - cerebral
Arthritis
Asbestosis
Ascariasis
Aseptic meningitis
Asherman syndrome
Asperger syndrome
Aspergillosis
Asphalt cement
Aspiration pneumonia
Aspirin overdose
Asthma
Asthma - pediatric
Astigmatism
Asymptomatic bacteriuria
Asymptomatic HIV infection
Ataxia - telangiectasia
Atelectasis
Atheroembolic renal disease
Atherosclerosis
Athlete's foot
Atrial fibrillation/flutter
Atrial myxoma
Atrial septal defect
Atrophic vaginitis
Attention deficit hyperactivity disorder (ADHD)
Atypical pneumonia
Autism
Autoimmune disorders
Autoimmune hepatitis
Automatic dishwasher soap poisoning
Autonomic hyperreflexia
Autonomic neuropathy
Avian influenza
Avoidant personality disorder
Axillary nerve dysfunction