• Abdominal Aortic Aneurysm

• Abdominal Pain

• Abnormal Heart Rhythms - See Arrhythmias

• Abruptio Placentae

• Abscess

• Acanthosis Nigricans

• Achalasia

• Achilles Tendon Rupture

• Acidosis

• Acne

• Acoustic Neuroma

• Acquired Immune Deficiency Syndrome - See AIDS

• Acquired Platelet Function Defect

• Acromegaly

• Actinic Keratosis

• Actinomycosis

• Acute Coronary Syndrome

See also: Angina Pectoris

See also: Heart Attack (Myocardial Infarction)

• Acute Kidney Failure - See Kidney Failure

• Acute Laryngotracheobronchitis - See Croup

• Acute Lymphocytic Leukemia

• Acute MI - See Acute Coronary Syndrome

• Acute Myelogenous Leukemia

• Acute Respiratory Distress Syndrome - See ARDS (Acute Respiratory Distress Syndrome)

• Acute Sinusitis - See Sinusitis

• Addison's Disease

• Adjustment Disorder

• Adrenal Cancer

• Adrenal Crisis

• Adrenal Hyperplasia, Congenital - See Congenital Adrenal Hyperplasia

• Adrenal Insufficiency - See Addison's Disease

• Adrenoleukodystrophy

• Adult Respiratory Distress Syndrome - See ARDS (Acute Respiratory Distress Syndrome)

• Agoraphobia

• AIDS

• Air Embolus - See Pulmonary Embolism

• Albinism

• Alcohol Withdrawal

• Alcoholic Cardiomyopathy

• Alcoholic Ketoacidosis

• Alcoholic Liver Disease and Cirrhosis

• Alcoholic Neuropathy

• Alcoholism and Related Problems

See also: Alcohol Withdrawal

See also: Alcoholic Cardiomyopathy

See also: Alcoholic Ketoacidosis

See also: Alcoholic Liver Disease and Cirrhosis

See also: Alcoholic Neuropathy

• Alkalosis

• Allergic Conjunctivitis - See Conjunctivitis

• Allergies

• Alopecia

• Alpha-1 Antitrypsin Deficiency

• Alport Syndrome

• ALS - See Amyotrophic Lateral Sclerosis

• Altitude Sickness

• Alzheimer's Disease

• Amblyopia

• Amebiasis

• Amenorrhea

• Amyloidosis

• Amyotrophic Lateral Sclerosis

• Anal Abscess and Fistula

• Anal Fissures

• Anaphylaxis

• Anaplastic Thyroid Cancer

• Anemia

• Anemia of Chronic Disease

• Aneurysm

• Angina Pectoris

See also: Acute Coronary Syndrome

• Angiodysplasia of the Colon

• Angioedema

• Ankle Dislocation

• Ankle Fracture

• Ankle Sprain

• Ankylosing Spondylitis

• Anorexia Nervosa

• Anterior Cruciate Ligament (ACL) Injury

• Anthrax

• Antibiotic-Associated Colitis

• Antibiotic-Resistant Infections

• Antisocial Personality Disorder - See Personality Disorders

• Antithrombin III Deficiency

• Anxiety

• Aortic Aneurysm - See Abdominal Aortic Aneurysm

See Thoracic Aortic Aneurysm

• Aortic Dissection

• Aortic Regurgitation

• Aortic Stenosis

• Aphthous Ulcers of the Mouth - See Mouth Ulcers

• Aplastic Anemia

• Appendicitis

• Apraxia

• ARDS (Acute Respiratory Distress Syndrome)

• Arrhenoblastoma of Ovary

• Arrhythmias

• Arteriovenous Malformation (AVM)

• Arthritis

• Asbestos - See Asbestosis

• Asbestosis

• Ascites

• Aseptic Meningitis

• Asperger's Syndrome

• Aspergillosis

• Aspiration Pneumonia

• Asthma

• Astigmatism

• Ataxia Telangiectasia

• Atelectasis

• Atherosclerosis

• Athlete's Foot - See Tinea Infections

• Atopic Dermatitis - See Eczema

• Atrial Fibrillation

• Atrial Septal Defect

• Attention Deficit Hyperactivity Disorder (ADHD)

• Atypical Mycobacterial Infection

• Autism

• Autoimmune Diseases