Diseases and Disorders
- Abatacept, for rheumatoid arthritis
- Abdominal aortic aneurysm (AAA)
- Abdominocentesis, for peritonitis
- ABI (ankle-brachial index)
- Abiraterone, for prostate cancer
- Abnormal uterine bleeding (AUB)
- ABVD, for Hodgkin lymphoma
- Acebutolol, for cardiac contusion
- AChR antibody
- Acid-ash diet, for urinary tract infection
- Acid-fast bacilli sputum, in tuberculosis
- Acoustic neuroma
- Acoustic windows, in abdominal trauma
- Acromegaly
- ACTH stimulation test, in adrenal crisis
- Activated charcoal
- Activated protein C (APC), for disseminated intravascular coagulation
- Acute adrenal crisis
- Acute alcohol intoxication
- Acute glomerulonephritis (AGN)
- Acute hemolytic transfusion reaction
- Acute inflammatory demyelinating polyneuropathy (AIDP)
- Acute leukemia
- Acute motor axonal neuropathy
- Acute motor axonal neuropathy (AMAN)
- Acute otitis media (AOM)
- Acute pharyngitis
- Acute poststreptococcal glomerulonephritis (APSGN)
- Acute renal failure
- Acute rheumatic fever
- Acute spasmodic laryngitis
- Addison anemia
- Addison disease (adrenal insufficiency)
- Adefovir dipivoxil, for hepatitis
- Adenectomy, transsphenoidal, for Cushing syndrome
- Adenoidectomy and tonsillectomy, for chronic tonsillitis
- Adenoma, pituitary
- Adenovirus, tonsillitis from
- Adhesive films, for pressure injury
- Adrenal crisis, acute
- Adrenal insufficiency (Addison disease)
- Adrenergic agents, for heart failure
- AIDS (acquired immunodeficiency syndrome)
- Air embolism
- Akinesia, in Parkinson disease
- Alcohol intoxication, acute
- Alcohol use disorder (AUD)
- Alcohol withdrawal
- Aldosterone deficiency
- Alginates, for pressure injury
- Allergic purpura (AP)
- Allergy testing
- Almotriptan, for migraine headache
- Alosetron, for irritable bowel syndrome
- Alpha-1 antitrypsin (AAT) level, in emphysema
- Alpha-2 adrenergic agonists, for glaucoma
- Alpha-adrenergic antagonists, for prostatitis
- Alpha-fetoprotein, in ovarian cancer
- Alpha-glucosidase inhibitors, for diabetes mellitus
- 5-alpha reductase inhibitor, for benign prostatic hyperplasia
- ALS (amyotrophic lateral sclerosis)
- ALS Functional Rating Scale
- AlternaGEL, for esophageal diverticula
- Altretamine, for ovarian cancer
- Alzheimer disease (AD)
- Ambrisentan, for pulmonary hypertension
- Aminocaproic acid, for cerebral aneurysm
- Ammonium chloride, for hypochloremia
- Amniocentesis, in chorioamnionitis
- Amphetamines, overdose and withdrawal symptoms of
- Amphojel, for esophageal diverticula
- Amphotericin B, for candidiasis
- Amputation
- Amyloidosis
- Amyotrophic lateral sclerosis (ALS)
- Anakinra, for rheumatoid arthritis
- Androgen deficiency
- Androgenic steroid, for endometriosis
- Angiotensin receptor blockers (ARBs), for heart failure
- Anidulafungin, for candidiasis
- Ankle-brachial index (ABI), in arterial occlusive disease
- Anoscopy, in hemorrhoids
- Anterior cord syndrome
- Anteromedial temporal resection (AMTR), for epilepsy
- Anthracycline (idarubicin, daunorubicin), for acute leukemia
- Anti-acetylcholine receptor (AChR) antibody
- Antiandrogens, for prostate cancer
- Anti-anxiety agents, for alcohol withdrawal
- Antiarrhythmics, for cardiomyopathy
- Antibody staining, in legionnaires disease
- Anticholinesterase drugs, for myasthenia gravis
- Anticyclic citrullinated peptide antibodies, in rheumatoid arthritis
- Antidiabetics, for diabetes mellitus
- Antiemetic, for migraine headache
- Antiestrogens, for breast cancer
- Antifibrotic agent, for pulmonary fibrosis
- Antigens, for herpes zoster
- Anti-ischemic agent, for angina pectoris
- Antimalarials, for lupus erythematosus
- Antimicrotubular, for prostate cancer
- Antimuscarinics, for emphysema
- Antinuclear antibody, in rheumatoid arthritis
- Antiparkinson agents, for Parkinson disease
- Antiproliferative drugs, for human papillomavirus
- Antiretroviral therapy, for HIV
- Anti-SARS-CoV-2 monoclonal antibodies, for COVID-19
- Antistreptolysin O (ASO) titer, in rheumatic fever
- Antithrombicagents, for myocardial infarction
- Antithrombin III, in disseminated intravascular coagulation
- Antithymocyte globulin, for aplastic anemia
- Antitissue transglutaminase antibody (anti-tTG), in celiac disease
- Anti-TNF agents, for Crohn disease
- Antitubercular agents, for tuberculosis
- Antitussives, for P jirovecii
- Anusol suppositories, for hemorrhoids
- Anxiolytics, for Alzheimer disease
- Aortic angiography, in aortic valve insufficiency
- Aortic regurgitation
- Aortic valve insufficiency (AI)
- Aortic valve stenosis (AS)
- Apheresis, for chronic leukemia
- Apixaban, for pulmonary embolism
- Aplastic anemia
- Aplastic crisis
- APOE gene
- Apomophine, for Parkinson disease
- Apparent life-threatening events
- Apparent life-threatening events (ALTEs), SIDS and
- Appendectomy
- Appendicitis
- Apraclonidine, for glaucoma
- Aqueous crystalline penicillin G, for syphilis
- Arboviruses
- Aripiprazole, for Alzheimer disease
- Arrhythmia, sinus
- Arterial air embolism
- Arterial occlusive disease
- Arterial pressure monitoring, in arterial occlusive disease
- Arteriography, ultrasound, in arterial occlusive disease
- Arteriosclerosis
- Arteriosclerosis obliterans
- Arthrodesis, for osteoarthritis
- Arthrogram, in tendinitis
- Asacol, for Crohn disease
- Aschoff bodies, in rheumatic fever
- ASO titer, in rheumatic fever
- Asparaginase, for acute leukemia
- Aspart, for diabetes mellitus
- Aspartate aminotransferase (AST), in cholecystitis and cholelithiasis
- Assay of factors VIII, IX, XI, in hemophilia
- Astrocytoma
- Atorvastatin, for hyperlipoproteinemia
- atrial
- Atrial flutter
- Atypical antipsychotics, for Alzheimer disease
- Autologous bone marrow transplantation (ABMT), for breast cancer
- Autologous tissue transfer, in breast reconstruction
- Autosomal dominant fascioscapulohumeral dystrophy
- Autosomal dominant polycystic kidney disease (ADPKD)
- Avian influenza
- Axonal injury, diffuse (DAI)
- Azoles, for candidiasis