A
Acantholysis
Achalasia
Acne vulgaris
Acute adrenal cortical failure
Acute appendicitis
Acute lymphadenitis
Acute pharyngitis
Acute tubular necrosis
Addison's disease
Adrenocortical neoplasms
AIDS
Alcoholic liver disease
Alopecia
Alzheimer's disease
Amyloidosis
Anal fissure
Anemia of chronic illness
Anencephaly
Aneurysm
Angina pectoris
Angiosarcoma
Aortic regurgitation
Aortic stenosis
Aplastic anemia
ARDS
Arnold-chiari malformation
Arteriosclerosis
Asbestos
Asthma
Atheroma
Atrial septal defect