- A/a gradient (alveolar/arterial gradient)
- a/A ratio (arterial/alveolar oxygen ratio)
- A/G ratio (albumin/globulin ratio)
- A 1c
- AAT ( α 1 -antitrypsin)
- AAT ( α 1 -antitrypsin) phenotype
- Abdomen
- Abdominal abscess, CT of
- Abdominal malignancy, peritoneal fluid analysis in
- Abdominal mass
- Abdominal pain
- Abdominal trauma/injury
- Abdominal wall defect, fetal, AFP levels in
- Abetalipoproteinemia
- ABGs (arterial blood gases)
- ABI (ankle-brachial index)
- ABO blood group
- Abortion
- ABR (auditory brainstem response)
- Abrasion, corneal, slit-lamp biomicroscopy of
- Abruptio placentae
- Abscess
- Abscess drainage, breast ultrasonography in
- Absolute value
- Absorptiometry, radiographic
- ACA (anticardiolipin antibody)
- Acalculous cholecystitis, hepatobiliary scan in
- Acanthamoeba, in stool culture
- Acanthocyte
- Acardiac twin, fetoscopy for
- Accessory spleen, ultrasonography of
- AcCHS (pseudocholinesterase)
- ACE (angiotensin-converting enzyme)
- Acetaminophen
- Acetoacetic acid
- Acetone
- Acetylcholine receptor (AChR) antibody
- Acetylcholinesterase (AChE)
- Acetylsalicylic acid (ASA)
- Achalasia
- AChE (acetlylcholinesterase)
- Achondroplasia, radiography in
- AChR (acetylcholine receptor) antibody
- Acid-base balance
- Acid-base disturbance, blood gas analysis in
- Acid clearing
- Acid elution slide test
- Acid fast bacilli culture and smear
- Acid fast stain
- Acid hemolysis test
- Acid intake, increased, blood gas
- Acid perfusion
- Acid reflux test
- Aciduria, methylmalonic, ketones in
- Acoustic neuroma
- Acquired angioedema, C4 levels in
- Acquired hemolytic anemia, osmotic fragility in
- Acquired immune deficiency syndrome (AIDS). See also Human immunodeficiency virus/HIV infection
- Acquired methemoglobinemia
- Acquired porphyria, urine porphyrins in
- Acrodermatitis enteropathica, zinc levels in
- Acromegaly
- ACTH levels in, Addison’s disease
- Actinomyces israelii, in cultures
- Actinomyces spp., on Pap smear
- Actin smooth muscle antibodies
- Activated charcoal
- Activated partial thromboplastin time (aPTT)
- Activity, hemoglobin and
- Activity intolerance, Holter monitoring in
- Acute cholecystitis, lipase levels in
- Acute cystitis, cystoscopy and
- Acute gout, phosphorus levels in
- Acute hemolysis, WBC count and differential in
- Acute infection
- Acute intermittent porphyria
- Acute kidney injury
- Acute leukemia
- Acute myeloblastic leukemia, bone marrow biopsy in
- Acute myeloid leukemia, platelet antibodies in
- Acute myocardial infarction. See also Myocardial infarction
- Acute myocardial infarction scan
- Acute nephritis, calcium levels in
- Acute pancreatitis
- Acute-phase inflammatory response, prealbumin in
- Acute-phase reaction
- Acute porphyrias. See also Acute intermittent porphyria delta-aminolevulinic acid levels in
- Acute post-streptococcal glomerulonephritis, cryoglobulin in
- Acute respiratory distress syndrome (ARDS), A/a gradient and a/A ratio in
- Acute respiratory failure, viral culture in
- Acute tubular necrosis
- Addison’s disease
- Adenocarcinoma, in Bethesda system
- Adenoma
- Adenomyosis, MRI in
- Adenopathy, pancreatic MRI of
- Adenovirus, in cultures
- Adhesion
- ADNase-B (antideoxyribonuclease-B)
- Adnexal torsion, ultrasound in
- Adnexal tumor, pelvic ultrasound in
- Adolescent
- Adrenal adenoma
- Adrenal arteriography
- Adrenal cancer, ACTH levels in
- Adrenal carcinoma
- Adrenal crisis
- Adrenal failure, urine sodium levels in
- Adrenal gland
- Adrenal gland destruction, scintiscan for
- Adrenal gland disorder, ADH in
- Adrenal hyperfunction
- Adrenal hyperplasia
- Adrenal hypofunction, cortisol levels in
- Adrenal infarction, scintiscan for
- Adrenal infection, scintiscan for
- Adrenal insufficiency
- Adrenal tumor
- Adrenocortical hyperfunction
- Adrenocortical insufficiency, blood magnesium level in
- Adrenocortical tumor, total testosterone in
- Adrenocorticoid insufficiency, osmolality in
- Adrenocorticosteroid, effects on WBC count and differential
- Adrenocorticotropic hormone (ACTH)
- Adrenocorticotropic hormone (ACTH) stimulated rapid test
- Adrenogenital syndrome, cortisol levels in
- Adrenoleukodystrophy, evoked brain potentials in
- Adult
- Adult Treatment Panel III (ATP III)
- AEP (auditory evoked potential)
- Aeromonas, in cultures
- Aerosol lung scan
- AFI (amniotic fluid index)
- Afibrinogenemia
- AFP ( α 1 -fetoprotein)
- Agammaglobulinemia, IgE in
- Agap (anion gap)
- Agatston score
- Age, advancing, effects on syphilis serology testing
- Agenesis, of pulmonary artery, MRI in
- Agglutination
- Agglutination test, and blood typing
- Aging adult
- Agranulocytosis, bone marrow biopsy in
- Air conduction hearing testing
- Air conduction test
- Air-contrast barium enema
- Airway obstruction, carbon dioxide levels in
- Airway-reactive disorder, PFTs in
- Airway resistance, plethysmography and
- Akinesia, blood pool imaging in
- Alanine
- Alanine aminotransferase (ALT)
- Albright-type kidney disease, potassium levels in
- Albumin/globulin ratio (A/G ratio)
- Albumin (Alb), . See also Microalbumin
- Alcohol abuse
- Alcoholic myopathy, biopsy in
- Alcoholism
- ALD (aldolase)
- Aldolase (ALD)
- Aldosterone, . See also Hyperaldosteronism
- Aldosteronism, adrenal gland scan for
- Alkali ingestion
- Alkaline phosphatase (ALP)
- Alkalosis
- Alleles
- Allen test
- Allergen profile
- Allergen-specific immunoglobulin E
- Allergic alveolitis, extrinsic, serology in
- Allergic rhinitis, IgE in
- Alpha 1 -antitrypsin
- Alpha 1 -antitrypsin phenotyping
- Alpha 1 -fetoprotein (AFP)
- Alpha 1 -globulin proteins, in blood
- Alpha 2 -globulin proteins, in blood
- Alpha-hemolytic streptococcus
- Alpha-lipoprotein deficiency, apolipoprotein B levels in
- Alpha microglobulin-1 protein, placental
- ALS (amyotrophic lateral sclerosis)
- ALT (alanine aminotransferase)
- Altered thought processes
- Altitude
- Alveolar/arterial gradient (A/a gradient)
- Alveolar hemorrhage, perinuclear antineutrophilic cytoplasmic antibodies in
- Alveolitis, extrinsic allergic, serology in
- Alzheimer’s disease (AD)
- alzheimer’s disease markers
- AMA (antimitochondrial antibody)
- AMA (antimitochondrial muscle antibody)
- Amblyopia
- Ambulatory monitoring
- Amebiasis
- Amebic abscess
- Amebic colitis, fecal analysis in
- Amebic meningitis, CSF analysis
- Amenorrhea
- American College of Cardiology (ACC)
- American Heart Association (AHA)
- American Society of Clinical Oncology (ASCO)
- Amethopterin (methotrexate)
- Amikacin
- Amino acid, ammonia and
- Aminoacidopathies
- Aminoacidopathy
- Amino acids
- Amino acid screen
- Amino acid substitution, hemoglobin electrophoresis in
- Aminoaciduria, amino acid levels in, urine test for
- Aminoglycosides
- Aminoglycoside toxicity, β 2 -microglobulin levels in
- Amiodarone
- Amitriptyline
- Ammonia
- Amniocentesis
- Amniotic fluid analysis
- Amniotic fluid index (AFI)
- AmniSure
- Amphetamine abuse
- Amsler grid
- Amylase
- Amyloidosis
- Amyloid precursor protein (APP)
- Amyotrophic lateral sclerosis (ALS)
- ANA (antinuclear antibody)
- Anal/genital culture
- Analbuminemia, A/G ratio in
- Anal canal mucosa, proctosigmoidoscopy and
- Anal fissure
- Anal fistula, proctosigmoidoscopy in
- Analgesic drugs
- Anal papillae, proctosigmoidoscopy and
- Anaphylaxis
- Anastomosis, proctosigmoidoscopy and
- Ancylostoma duodenale infection, O & P in
- Androgen resistance syndrome, testosterone in
- Anemia
- Anesthesia
- Aneurysm
- Angelman syndrome
- Angiitis, perinuclear antineutrophilic cytoplasmic antibodies in
- Angina pectoris, troponin level in
- Angiodysplasia, GI blood loss scan in
- Angioedema, C4 levels in
- Angiography
- Angioplasty
- Angiotensin
- Angiotensin-converting enzyme (ACE)
- Angiotensinogen
- Angle-closure glaucoma, IOP in
- Angle structures of anterior chamber of eye
- 1,5-Anhydroglucitol, and diabetes
- Anion
- Anion gap
- Anisocytosis
- Anisometropia, refraction in
- Ankle, arthrogram of
- Ankle-brachial index (ABI)
- Ankle pressure, plethysmography and
- Ankylosing rheumatoid spondylitis
- Anomalous atrioventricular excitation, stress test in
- Anorchia, LH levels in
- Anorectal abscess, proctosigmoidoscopy for
- Anorectal infection, viral cultures in
- Anorexia nervosa
- Anoscopy
- Anovulation
- Anoxia, blood gas analysis in
- ANP (atrial natriuretic peptide)
- ANS (autonomic nervous system) dysfunction, catecholamine levels in
- Anserine
- Antacids, effects on blood magnesium levels
- Anterior chamber of eye
- Anterior pituitary hypofunction, FSH in
- Anthrax
- Anti-A antibody
- Antianginal effectiveness, stress test for
- Anti-B antibody
- Antibiotic therapy
- Antibody(ies). See also Immunoglobulin entries
- Antibody screen
- Anticardiolipin antibody (ACA)
- Anticentromere antibody
- Anticholinergics
- Anticoagulant therapy
- Anticonvulsant drugs
- Anti-cyclic citrullinated peptide antibody
- Anti-D antibody
- Antideoxyribonuclease-B, streptococcal
- Antidepressants
- Antidiuretic hormone (ADH)
- Anti-DNA antibody
- Anti-ds DNA
- Antidysrhythmic drugs
- Antidysrhythmic effectiveness, stress test for
- Anti-ENA (antiextractable nuclear antigen)
- Antiextractable nuclear antigen
- Antifungal antibodies
- Anti-GBM antibody
- Antigen/antibody, antiextractable nuclear
- Antiglobulin testing
- Anti-glomerular basement membrane antibody
- Anti-inflammatory drugs
- Anti-Jo antibody
- Antimanic drugs
- Antimetabolite therapy, RBC indices in
- Antimicrobial drugs
- Antimicrobial removal device (ARD)
- Antimicrobial therapy
- Antimitochondrial/antismooth muscle antibody
- Antineoplastic drugs, WBC count and differential and
- Antineutrophilic cytoplasmic antibody
- Antinuclear antibody (ANA)
- Antiphospholipid antibody syndrome
- Antiphospholipid syndrome
- Antiplatelet antibody
- Antiplatelet therapy
- Antiprothrombin antibodies, lupus anticoagulant antibodies and
- Antipsychotic drugs
- Antipyretic drugs
- Antiretroviral therapy (ART)
- Anti-ribonucleoprotein
- Antiscleroderma antibody
- Antisperm antibodies
- Antistreptolysin O antibody (ASO)
- Antithrombin III (AT-III)
- Antithyroglobulin antibody
- Antithyroid peroxidase antibody
- Antrum syndrome, retained
- Anuria, quinidine toxicity and
- Anus, visualization of, proctosigmoidoscopy in
- Anxiety
- Anxiolytics, effect on EEG
- Aortic aneurysm
- Aortic atherosclerosis, coronary angiography in
- Aortic coarctation
- Aortic dissection
- Aortic valve abnormality
- Aortitis, coronary angiography in
- Aortoduodenal fistula, GI blood loss scan in
- Aplasia, pyruvate kinase levels in
- Aplastic anemia
- Apnea
- Apolipoprotein E4 allele
- Apolipoproteins (A, B, and E)
- Appendectomy, laparoscopic
- Appendicitis
- Appendix, pelvic ultrasonography and
- APTT (activated partial thromboplastin time)
- ARD (antimicrobial removal device)
- ARDS (acute respiratory distress syndrome), A/a gradient and a/A ratio in
- Areflexia, magnesium toxicity and
- Arenaviruses
- Areola, scaly skin of, breast biopsy for
- Arginine
- Arginosuccinic aciduria (ASA)
- Argonz-Del Castillo syndrome, prolactin level in
- Arm, x-ray of
- ART (antiretroviral therapy)
- ART (automated reagin testing)
- Arterial/alveolar oxygen ratio (a/A ratio)
- Arterial aneurysm
- Arterial atherosclerotic obstruction, plethysmography in
- Arterial blood gases
- Arterial blood oxygen saturation (SpO 2 )
- Arterial blood pressure
- Arterial calcification
- Arterial dysplasia, kidney angiography in
- Arterial embolism, plethysmography in
- Arterial hypoplasia, pulmonary angiography in
- Arterial infarction, kidney angiography in
- Arterial injury, renogram in
- Arterial occlusion
- Arterial oxygen saturation
- Arterial plethysmography
- Arterial stenosis
- Arterial thrombosis
- Arterial-venous shunt, A/a gradient and a/A ratio in
- Arteriovenous fistula
- Arteriovenous malformation (AVM)
- Arteriovenous shunt, fluorescein angiography in
- Arteritis, temporal, ESR in
- Artery. See also specific arteries
- Artherosclerotic cardiovascular disease (ASCVD)
- Arthralgia, in Lyme disease
- Arthritis, degenerative. See also Rheumatoid arthritis
- Arthrocentesis
- Arthrogram
- Arthroscopy
- Artificial ventilation, blood gas analysis in
- ASA (arginosuccinic aciduria)
- Asbestosis, pulmonary function studies in
- A-scan ultrasonography
- Ascariasis, O & P in
- Ascaris, in stool culture
- Ascaris lumbricoides infection, O & P in
- Ascites
- Ascites fluid analysis
- Ascorbic acid
- ASCVD (atherosclerotic cardiovascular disease)
- ASMA (antismooth muscle antibody)
- Asparagine
- Aspartate aminotransferase (AST)
- Aspartic acid
- Aspergilloma, pulmonary angiography in
- Aspergillosis, IgE level in
- Aspergillus
- Aspiration
- Aspiration pneumonia, sputum cytology in
- Aspiration scan
- Asplenia, osmotic fragility in
- AST (aspartate aminotransferase)
- Asthma
- Asthmatic shock, carbon dioxide levels in
- Astigmatism, refraction in
- Ataxia-telangiectasia
- Atelectasis
- Atherectomy
- Atherosclerosis
- Atherosclerotic cardiovascular disease (ASCVD)
- AT-III (antithrombin III)
- Atopic dermatitis, IgE in
- ATP III (Adult Treatment Panel III)
- Atransferrinemia, transferrin levels in
- Atresia
- Atrial hypertrophy, ECG in
- Atrial mural thrombus
- Atrial natriuretic peptide (ANP, atrial natriuretic factor, atrial natruretic hormone)
- Atrial septal defect, lung perfusion scan in
- Atrial tumor
- Atrophic changes, colposcopy of
- Atrophy
- Audiogram
- Audiometry
- Auditory brainstem response (ABR)
- Auditory canal, examination of
- Auditory evoked potential (AEP)
- Auditory nerve, MRI of
- Auditory nerve lesion, ABR and
- Autoimmune disorder
- Autoimmune hemolysis, haptoglobin level in
- Autoimmune hemolytic anemia
- Autoimmune hepatitis
- Autoimmune liver disease, perinuclear antineutrophilic cytoplasmic antibodies in
- Autoimmune parathyroid destruction, PTH in
- Autoimmune syndromes, polyendocrine insulin antibodies in
- Autoimmune thyroiditis, C4 levels in
- Automated reagin testing (ART)
- Automobile work, lead exposure from
- Autonomic nervous system dysfunction, catecholamine levels in
- Autosomal dominant traits
- Autosomal recessive traits
- Autosomes
- Avascular necrosis, MRI in
- Axillary node
- Axillary vein disease, MRV in
- Azoospermia, semen analysis in
- Azotemia
- AZT (zidovudine), effects on BMG levels
Davis's Lab & Diagnostic Tests