A-a: alveolar-arterial
AAA: abdominal aortic aneurysm
Ab: antibody
ABG: arterial blood gas
ABI: ankle brachial index
ACE: angiotensin-converting enzyme
ACTH: adrenocorticotropic hormone
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AFB: acid-fast bacteria
ALT: alanine aminotransferase
AMA: antimitochondrial antibody
AMP: adenosine monophosphate
ANA: antinuclear antibody
ASMA: anti–smooth muscle antibody
AST: aspartate aminotransferase
BNP: B-type natriuretic peptide
BUN: blood urea nitrogen
c-ANCA: cytoplasmic antineutrophil cytoplasmic antibodies
CBC: complete blood cell
CDI: Clostridium difficile infection
CHF: congestive heart failure
CMV: cytomegalovirus
CPK: creatinine phosphokinase
C&S: culture and sensitivity
CSF: cerebrospinal fluid
CT: computed tomography
DHEAS: dehydroepiandrosterone sulfate
DIC: disseminated intravascular coagulation
DNA: deoxyribonucleic acid
Ds: double strand
DS: dehydroepiandrosterone
DVT: deep vein thrombosis
EB: Epstein-Barr
ECG: electrocardiogram
ECM: erythema chronicum migrans
ELISA: enzyme-linked immunosorbent assay
EMG: electromyogram
EPS: electrophysiologic
ERCP: endoscopic retrograde cholangiopancreatography
ESR: erythrocyte sedimentation rate
EUS: endoscopy ultrasound
FBS: fasting blood sugar
FENa: fractional excretion of sodium
FNAB: fine-needle aspiration biopsy
FSH: follicle-stimulating hormone
FUO: fever of undetermined origin
GB: gallbladder
GFR: glomerular filtration rate
GGT: γ-glutamyl transferase
GGTP: γ-glutamyl transpeptidase
GnRH: gonadotropin-releasing hormone
HBsAg: hepatitis B surface antigen
hCG: human chorionic gonadotropin
HCV: hepatitis C virus
HIV: human immunodeficiency virus
HSV: herpes simplex virus
IEP: immunoelectrophoresis
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INR: International Normalized Ratio
IV: intravenous
IVP: intravenous pyelogram
K: potassium
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LDH: lactate dehydrogenase
LGV: lymphogranuloma venereum
LH: luteinizing hormone
LKM: liver kidney microsomal
LS: lumbosacral
LP: lumbar puncture
Na: sodium
MIBG: metaiodobenzylguanidine
MRA: magnetic resonance angiogram
MRCP: magnetic resonance cholangiopancreatography
MRDTI: magnetic resonance direct thrombus imaging
MRI: magnetic resonance imaging
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O&P: orthotic and prosthetic
OR: operating room
PA: posteroanterior
PAC: plasma aldosterone concentration
p-ANCA: perinuclear antineutrophil cytoplasmic antibody
PCOS: polycystic ovary syndrome
PCR: polymerase chain reaction
PCreat: plasma creatinine
PE: pulmonary embolism
PET: positron emission tomography
PFA: platelet function analysis
PNa: plasma sodium
PPD: purified protein derivative
PRA: plasma renin activity
PSA: prostate-specific antigen
PT: prothrombin time
PTH: parathyroid hormone
PTT: partial thromboplastin time
RAIU: radioactive iodine uptake
RBC: red blood cell
RDW: red blood cell distribution width
RF: rheumatoid factor
RNP: ribonucleoprotein
r/o: rule out
RSD: reflex sympathetic dystrophy
SBE: subacute bacterial endocarditis
TB: tuberculosis
Tc: technetium
TEE: transesophageal echocardiogram
TIA: transient ischemic attack
TIBC: total iron-binding capacity
TRH: thyrotropin-releasing hormone
TSH: thyroid-stimulating hormone
TT: thrombin time
TTKG: transtubular potassium gradient
UGI: upper gastrointestinal
UCreat: urine creatinine
UNa: urine sodium
UOsmo: urine osmolarity
VDRL: venereal disease research laboratories
V/Q: ventilation-perfusion
WBC: white blood cell
