Abdominal adhesions
Abortion, spontaneous
Abscess, cutaneous
Achalasia
Acne rosacea
Acne
Active hepatitis, chronic
Acute gastric dilatation
Acute laryngitis
Addison's disease
Adenosis of breast
Adhesive capsulitis
Adiposis
Adnexitis
Adrenocortical insufficiency
Adult respiratory distress syndrome
Agalactia
Agranulocytosis
Aleukia hemorrhagica
Allergic purpura
Allergic rhinitis
Alopecia
Alzheimer's disease
Amenorrhea
Amyloidosis of skin
Anal cancer
Anal fissure/ulcer
Anal fistula
Anal itch
Anal Prolapse
Anal stenosis
Anemia due to folate deficiency
Anemia of chronic blood loss
Anemia, aplastic
Anemia, autoimmune hemolytic
Anemia, pernicious
Angina
Angioma
Ankylosing spondylitis
Anorectal fissure
Anorectal fistula

Anorexia nervosa
Anterior chest wall syndrome
Anthrax
Anxiety
Aortic arch syndrome
Aphthous stomatitis
Appetite disorder
Armpit odor
Arrhythmia - atrial fibrillation
Arrhythmia - heart block
Arrhythmia - paroxysmal tachycardia
Arrhythmia - pre-excitation syndrome
Arrhythmia - premature beat
Arrhythmia - sinus bradycardia
Arrhythmia - sinus tachycardia
Arterial embolus
Arteriosclerosis
Arteriosclerotic heart disease
Arthritis, juvenile rheumatoid
Arthritis, osteo
Arthritis, rheumatoid
Asbestosis
Ascariasis
Ascites due to schistosomiasis
Aseptic osteonecrosis
Asthma
Ataxia of Friedreich
Atelectasis
Atherosclerosis
Atherosclerotic occlusive disease
Athlete's foot
Atopic dermatitis
Atrial fibrillation (AF; A Fib)
Atrial premature beats/depolarization
Atrioventricular block, complete
Atrophic gastritis, chronic
Atrophic glossitis
Atrophic rhinitis
Attention deficit hyperactivity disorder
Azoospermia