Abdominal aortic aneurysm
Abdominal compartment syndrome
Abdominal vascular injury
Abnormal uterine bleeding
Accidental hypothermia
Acetaminophen overdose
Achalasia
Achilles tendinopathy
Acne vulgaris
Acromegaly
Actinic keratosis
Acute altitude illness
Acute appendicitis
Acute bacterial meningitis
Acute bacterial prostatitis
Acute bacterial rhinosinusitis
Acute bronchitis
Acute cholangitis
Acute cholecystitis
Acute colonic pseudo-obstruction
Acute compartment syndrome
Acute cystitis
Acute diarrhea
Acute diverticulitis
Acute epididymitis
Acute fatty liver of pregnancy
Acute hepatic porphyria
Acute interstitial nephritis
Acute ischemic stroke
Acute kidney injury
Acute limb ischemia
Acute liver failure
Acute lymphoblastic leukemia
Acute mesenteric ischemia
Acute myeloid leukemia
Acute otitis externa
Acute otitis media
Acute pain
Acute pancreatitis
Acute pericarditis
Acute promyelocytic leukemia
Acute pyelonephritis
Acute respiratory distress syndrome
Acute transfusion reactions
Acute urticaria
Acute-on-chronic liver failure
Adenomyosis
Adhesive capsulitis
Adnexal torsion
Adolescent idiopathic scoliosis
Adrenal incidentaloma
Adrenocortical carcinoma
Adult growth hormone deficiency
Adult-onset Still's disease
Advanced maternal age pregnancy
African trypanosomiasis
Alagille syndrome
Alcohol use disorder
Alcohol withdrawal syndrome
Alcohol-related liver disease
Allergic bronchopulmonary aspergillosis
Allergic conjunctivitis
Allergic rhinitis
Allied disorders of Hirschsprung's disease
Alopecia areata
Alpha-1 antitrypsin deficiency
Alport syndrome
Alzheimer's disease
Amblyopia
Amenorrhea
Amiodarone-induced thyroid disorders
Ampullary cancer
Amyotrophic lateral sclerosis
Anal cancer
Anal fissure
Anaphylaxis
Androgenetic alopecia
Anemia of chronic kidney disease
Animal bites
Ankle fracture
Ankle osteoarthritis
Ankle sprain
Anogenital warts
Anorectal abscess
Anorectal fistula
Anorectal varices
Anorexia nervosa
Anterior cruciate ligament injury
Anti-glomerular basement membrane disease
Antidromic atrioventricular reentrant tachycardia
Antimicrobial-resistant Gram-negative infections
Antiphospholipid syndrome
Anxiety and depression in patients with cancer
Aortic intramural hematoma
Aortic regurgitation
Aortic stenosis
Aplastic anemia
Appendiceal neoplasm
Arginine vasopressin deficiency
Arrhythmogenic right ventricular cardiomyopathy
Ascites
Aspirin overdose
Assisted human reproduction
Assisted vaginal delivery
Asthma
Astrocytoma and oligodendroglioma
Asymptomatic bacteriuria
Atopic dermatitis
Atrial fibrillation
Atrial flutter
Atrioventricular nodal reentrant tachycardia
Atrophic gastritis
Attention deficit hyperactivity disorder
Atypical hemolytic uremic syndrome
Autism spectrum disorder
Autoimmune hemolytic anemia
Autoimmune hepatitis
Autoimmune pancreatitis
Autosomal dominant polycystic kidney disease
Axial spondyloarthritis