asthma
Ascaris lumbricoides
Ancylostoma duodenale
anxiety disorders
atelectasis
acne vulgaris
Ackerman syndrome
Apert syndrome
Aarskog syndrome
Aase syndrome
arthritis
Alkaptonuria
Ablutophobia
Acarophobia
Acerophobia
Achluophobia
Acousticophobia
Acrophobia
Aspergillosis
Abruptio Placentae
Acanthamoeba
Acanthosis Nigricans
Achalasia
Achondroplasia
Acidosis
Acoustic Neurinoma
Acquired Cystic Kidney Disease
Acromegaly
Actinic keratosis
Actinymycosis
Acute Appendicitis
Acute Bacterial Prostatitis
Acute Bronchitis
Acute Disseminated Encephalomyelitis
Acute Kidney Failure
Acute Lymphocytic Leukemia
Acute Myeloid Leukemia
Acute Nonulcer Dyspepsia
Acute Pancreatitis
Acute Rheumatic Fever
Acute Urinary Retention
Ataxia
Ataxia Telangiectasia
Atheroma
Atherosclerosis
Ankylosis
Anorexia
Anorexia Nervosa
Adenitis
Adenoiditis
Adenoma
Adenomyosis
Alopecia
Aphasia
Albinism
Angiopathy
Angina
Abetalipoproteinemia
Agranulocytosis
Amyotrophic lateral sclerosis
Autonomic neuropathy
Anthrax
Apraxia
Atrial septal defect
Acute renal failure
Aagenaes syndrome
Aicardi syndrome
Amniotic band syndrome
Aniridia
Athetosis
Anisometropia
Atrial flutter
Asperger syndrome
Autism
Androgen insensitivity syndrome
Adrenoleukodystrophy
Angelman syndrome
Anxiety disorder
Agoraphobia
Adducted thumb syndrome
Aortic valve stenosis
Aplastic anemia
Alcoholic liver disease
Aneuploidy
Aneurysm
Atrial fibrillation
Avoidant personality disorder
Absence seizure
Anal fissure
Ankylosing spondylitis
Adrenal insufficiency
Arrhythmogenic right ventricular dysplasia
Aortic insufficiency
Alexander disease
Aortic dissection
Arc eye
Achromatopsia
Anencephaly
Amenorrhoea
Adenocarcinoma
Antiphospholipid syndrome
Alpha-fetoprotein
Ascites
Antisocial personality disorder
Arnold-Chiari malformation
Akathisia
Acheiropodia
Agnosia
Asphyxia
Argyria
Arsenic poisoning
Attention-deficit hyperactivity disorder
Appendicitis
Alport syndrome
Amaurosis fugax
Argyll Robertson pupil
Acute lymphoblastic leukemia
Abdominal aortic aneurysm
Adrenal Hyperplasia
Anal fistula
Adenoid cystic carcinoma
Adult T-cell leukemia
Achard-Thiers syndrome
Attenuated patella alta
Altitude sickness
Acinic cell carcinoma
Abnormal Metabolite/Disease Marker
Adenylosuccinate lyase deficiency
Aberrant subclavian artery
Aphakia
Aminoaciduria
Amyloid degeneration
Autoimmunity
Autosomal dominant nocturnal frontal lobe epilepsy
Amnesia
Arachnoiditis
Arbovirus
Angioma
Angioedema
Adrenal cancer
Alveolar Hydatid
Alternating Hemiplegia
Alpers Syndrome
Alopecia Areata
Anxiety
Avitaminosis
Anaphylaxis
Anemia
Arthralgia
Ascariasis
Asbestosis
Acute respiratory distress syndrome
Alkalosis
Amblyopia
Arrhythmia
Atopic dermatitis
Amenorrhea
Aphthous ulcer
Amebiasis