| Amenorrhea – primary |
| Amenorrhea – secondary |
| American mountain fever |
| American nightshade poisoning |
| American trypanosomiasis |
| Amilon |
| Amino acids |
| Amino acids – urine |
| Amino acids blood test |
| Aminoaciduria |
| Aminophylline overdose |
| Amitriptyline and Perphenazine overdose |
| Amitriptyline hydrochloride overdose |
| AML |
| Ammonia poisoning |
| Ammonium hydroxide poisoning |
| Ammonium ion |
| Amnesia |
| Amniocentesis |
| Amniotic band sequence |
| Amniotic constriction bands |
| Amniotic fluid |
| AMP |
| Amphetamine intoxication |
| Amphetamines – screen |
| Amputation – traumatic |
| Amsler grid test |
| Amylase – blood |
| Amylase – urine |
| Amyloid – primary |
| Amyloidosis – cardiac |
| Amyloidosis – cerebral |
| Amyloidosis – hereditary |
| Amyloidosis – secondary systemic |
| Amyloidosis – senile |
| Amyotrophic lateral sclerosis |
| ANA |
| ANA panel |
| Anaerobe |
| Anaerobic |
| Anaerobic bacteria |
| Anaerobic pneumonia |
| Anal abscess |
| Anal atresia |
| Anal fissure |
| Analgesic nephropathy |
| Analgesics |
| Analgesics – screen |
| Anaphylactic reaction |
| Anaphylactic shock |
| Anaphylactoid purpura |
| Anaphylaxis |
| Anaplastic carcinoma of the thyroid |
| Anaplastic thyroid cancer |
| Anasarca |
| Anastomosis |
| Ancylostoma braziliense |
| Androblastoma |
| Androgen insensitivity syndrome |
| Androgenetic alopecia |
| Androgenic alopecia in women |
| Andropause |
| Anemia |
| Anemia – B12 deficiency |
| Anemia – Fanconi’s |
| Anemia – hemolytic |
| Anemia – hemolytic – caused by chemicals or toxins |
| Anemia – hemolytic due to G6PD deficiency |
| Anemia – idiopathic aplastic |
| Anemia – idiopathic autoimmune hemolytic |
| Anemia – immune hemolytic |
| Anemia – immune hemolytic – secondary to drugs |
| Anemia – iron deficiency |
| Anemia – iron deficiency – children |
| Anemia – megaloblastic |
| Anemia – secondary aplastic |
| Anemia – sickle cell |
| Anemia of chronic disease |
| Anemia of inflammation |
| Anencephaly |
| Anesthesia |
| Aneurysm |
| Aneurysm – aortic |
| Aneurysm – cerebral |
| Aneurysm – thoracic aortic |
| Aneurysm in the brain |
| Angel dust overdose |
| Angel wings plant poisoning |
| Angel’s trumpet |
| Angina |
| Angina – chronic |
| Angina – stable |
| Angina – unstable |
| Angina – variant |
| Angina pectoris |
| Angio-osteohypertrophy |
| Angiodysplasia of the colon |
| Angioedema |
| Angiofibroma – juvenile |
| Angiogram |
| Angiogram – coronary |
| Angiography |
| Angiography – aorta |
| Angiography – head |
| Angiography – heart |
| Angiography – left heart |
| Angiography – magnetic resonance |
| Angiography – renal |
| Angiography – right heart |
| Angiography/arteriography of the extremity |
| Angioma – cherry |
| Angioma cavernosum |
| Angioneurotic edema |
| Angioplasty |
| Angle tumor |
| Anhidrosis |
| Anhidrotic ectodermal dysplasia |
| Anhydrous Benedict’s reagent poisoning |
| Animal bites |
| Anions |
| Anisocoria |
| Ankle arthroplasty – total |
| Ankle pain |
| Ankle replacement |
| Ankle swelling |
| Ankyloglossia |
| Ankylosing spondylitis |
| Annular pancreas |
| Anorchia |
| Anorectal abscess |
| Anorectal malformation |
| Anorectal malformation repair |
| Anorexia nervosa |
| Anorexia nervosa – resources |
| Anorgasmia |
| Anoscopy |
| Anosmia |
| Anovulatory bleeding |
| Antacids overdose |
| Anterior |
| Anterior and/or posterior colporrhaphy |
| Anterior and/or posterior vaginal wall repair |
| Anterior cruciate ligament (ACL) injury |
| Anterior knee pain |
| Anterior spinal fusion |
| Anterior tibia pain |
| Anterior uveitis |
| Anterior vaginal wall repair |
| Anthrax |
| Anthrax – inhalation |
| Anthrax – skin |
| Anthrax serology test |
| Anthrosilicosis |
| Anti-DNase B |
| Anti-gastric parietal cell antibodies |
| Anti-GBM antibodies |
| Anti-glomerular basement membrane |
| Anti-glomerular basement membrane antibody disease |
| Anti-insulin antibody test |
| Anti-P antibody |
| Anti-reflux surgery |
| Anti-rust products |
| Anti-smooth muscle antibody |
| Antibiotic associated colitis |
| Antibiotic sensitivity |
| Antibiotics – colds and flu |
| Antibody |
| Antibody test for anthrax |
| Antibody titer |
| Antibody to human glomerular basement membrane |
| Anticoagulant rodenticides poisoning |
| Antideoxyribonuclease B titer |
| Antidepressants – screen |
| Antidiarrheal agent overdose |
| Antidiuretic hormone |
| Antifreeze poisoning |
| Antigen |
| Antimicrosomal antibody |
| Antimitochondrial antibody |
| Antinuclear antibody panel |
| Antiparietal cells antibodies |
| Antiseptic mouth rinse overdose |
| Antisocial personality disorder |
| Antistreptolysin O titer |
| Antithrombin III |
| Antithrombin III deficiency – congenital |
| Antithyroglobulin antibody |
| Antithyroid microsomal antibody |
| Anxiety |
| Anxiety disorder |
| Anxiety in children |
| Anxiety vs. stress |
| AOP |
| Aortic aneurysm – dissecting |
| Aortic aneurysm – thoracic |
| Aortic angiography |
| Aortic arch syndrome |
| Aortic coarctation |
| Aortic dissection |
| Aortic insufficiency |
| Aortic regurgitation |
| Aortic stenosis |
| Aortic valve prolapse |
| Aortic valve stenosis |
| Aortography |
| AOSD |
| APCA |
| Apert syndrome |
| APGAR |
| Aphasia |
| Aphasia – primary progressive |
| Aphthous ulcer |
| Apis venenum purum poisoning |
| Apis virus poisoning |
| Apitoxin poisoning |
| Aplastic |
| Apnea |
| Apnea – newborns |
| Apnea – sleep apnea syndrome |
| Apnea monitor – infants |
| Apnea monitor for home use – infants |
| Apnea of prematurity |
| ApoB100 |
| ApoCII |
| Apolipoprotein B deficiency |
| Apolipoprotein B100 |
| Apolipoprotein CII |
| Apoplexy |
| Apoprotein B100 |
| Apoprotein CII |
| Appendectomy |
| Appendicitis |
| Appendix removal |
| Appetite – decreased |
| Appetite – increased |
| Apprehension |
| Appropriate for gestational age (AGA) |
| Apraxia |
| Aprosencephaly with open cranium |
| APTT |
| Aquarium granuloma |
| Aqueous – ammonia |
| Arachnodactyly |
| ARDS (acute respiratory distress syndrome) |
| Areolar gland abscess |
| ARF |
| Arginine test |
| Arginine vasopressin |
| Arias syndrome (type II Crigler-Najjar) |
| Arisaema triphyllum poisoning |
| Arkless-Graham |
| Arm and leg movements – uncontrollable |
| Armpit lump |
| Arnold Pick’s disease |
| Arrhenoblastoma |
| Arrhenoblastoma of ovary |
| Arrhythmias |
| ART |
| Art line – infants |
| Arterial blood gas analysis |
| Arterial embolism |
| Arterial insufficiency |
| Arterial insufficiency of the legs |
| Arterial stick |
| Arteriogram |
| Arteriogram – abdomen |
| Arteriolar nephrosclerosis |
| Arteriosclerosis |
| Arteriosclerosis obliterans |
| Arteriosclerosis of the extremities |
| Arteriosclerotic heart disease |
| Arteriovenous malformation – cerebral |
| Arteriovenous malformation – pulmonary |
| Arteritis – temporal |
| Arthralgia |
| Arthritis |
| Arthritis – neck |
| Arthritis – osteoarthritis |
| Arthritis – psoriatic |
| Arthritis – resources |
| Arthritis – rheumatoid |
| Arthrodesis |
| Arthroplasty – unicompartmental knee |
| Arthroscopy |
| Articulation deficiency |
| Artificial flavors and color |
| Artificial kidneys |
| Artificial pacemaker |
| Artificial sphincter – rectal or urinary |
| Arylsulfatase A deficiency |
| As and Bs |
| Asbestos-related pleural effusion |
| Asbestosis |
| Ascariasis |
| Ascites |
| Ascorbic acid |
| ASD |
| ASD repair |
| Aseptic meningitis |
| Aseptic necrosis |
| ASH |
| Asherman syndrome |
| ASLO |
| ASO titer |
| Asparaginic acid |
| Aspartate aminotransferase |
| Aspartic acid |
| Aspartoacylase deficiency |
| Asperger syndrome |
| Aspergilloma |
| Aspergillosis |
| Aspergillosis – acute invasive |
| Aspergillosis – allergic bronchopulmonary |
| Aspergillosis precipitin |
| Aspergillus immunodiffusion test |
| Asphalt |
| Asphalt cement |
| Aspiration |
| Aspiration of vomitus |
| Aspiration pneumonia |
| Aspiration pneumonitis |
| Aspirin overdose |
| Assisted reproductive technology |
| AST |
| Asthma |
| Asthma – occupational exposure |
| Asthma – pediatric |
| Asthma and allergy – resources |
| Astigmatism |
| Astrocytoma – adults |
| Astrocytoma – children |
| Asymmetric septal hypertrophy |
| Asymptomatic |
| Asymptomatic bacteriuria |
| Asymptomatic HIV infection |
| AT III |
| Atarax overdose |
| Ataxia |
| Ataxia – acute cerebellar |
| Ataxia – telangiectasia |
| Atelectasis |
| Atensine overdose |
| Atheroemboli – renal |
| Atheroembolic renal disease |
| Atherosclerosis |
| Atherosclerosis – aging |
| Atherosclerotic disease – renal |
| Athetoid movements |
| Athlete’s foot |
| ATN |
| Atopic dermatitis |
| Atresia – pulmonary |
| Atrial fibrillation/flutter |
| Atrial myxoma |
| Atrial septal defect |
| Atrial septal defect repair |
| Atropa belladonna poisoning |
| Atrophic vaginitis |
| Atrophy of the muscles |
| Atropine with diphenoxylate |
| Attention deficit hyperactivity disorder (ADHD) |
| Attention span |
| Atypical mycobacterial infection |
| Atypical pneumonia |
| Audiography (audiogram) |
| Audiology |
| Audiometry |
| Augmentation mentoplasty |
| Aural polyps |
| Auricular fibrillation |
| Auscultation |
| Autism |
| Autism – resources |
| Autistic behavior |
| Autoerythrocyte sensitivity |
| Autograft |
| Autoimmune disorders |
| Autoimmune hemolytic anemia |
| Autoimmune hepatitis |
| Autoimmune liver disease panel |
| Autoimmune thyroiditis |
| Autoinoculation |
| Automated perimetry exam |
| Automatic dishwasher soap – poisoning |
| Automobile safety – teenage drivers |
| Autonomic hyperreflexia |
| Autonomic neuropathy |
| Autosomal dominant |
| Autosomal dominant polycystic kidney disease |
| Autosomal recessive |
| Avascular necrosis |
| Avian influenza |
| AVM – cerebral |
| AVN |
| Avoidant personality disorder |
| AVP |
| Axid overdose |
| Axillary abscess |
| Axillary lymph enlargement |
| Axillary lymphadenopathy |
| Axillary nerve dysfunction |
| Azo 22 overdose |
| Azotemia – prerenal |
