C DIFFClostridium difficile
C-peptideconnecting peptide
C/PMclose or positive surgical margin
C&Sculture and sensitivity
C1first cervical spine vertebra
C2second cervical spine vertebra
C3third cervical spine vertebra
C4fourth cervical spine vertebra
C5fifth cervical spine vertebra
C6sixth cervical spine vertebra
C7seventh cervical spine vertebra
CA19-9carbohydrate antigen 19-9
CAAcerebral amyloid angiopathy
CABcoronary artery bypass
CABGcoronary artery bypass graft
CACcoronary artery calcium
CADcomputer-aided detection
CAD-3three-vessel coronary artery disease
CADASILcerebral autosomal dominant arteriopathy with subcortical infarcts and leucoencephalopathy
CADDcombined annotation dependent depletion
CAHchronic active hepatitis
cAMPcyclic adenosine monophosphate
CANVAScerebellar ataxia, neuropathy, vestibular areflexia syndrome
CAPcommunity acquired pneumonia
CAPScryopyrin-associated periodic syndrome
CARchimeric antigen receptor
CAR-Tchimeric antigen receptor T-cell
CARSChildhood Autism Rating Scale
CASclinical activity score
CASL-2Comprehensive Assessment of Spoken Language, Second Edition
CATcomputerized axial tomography
CATCHConsult for Addiction Treatment and Care in Hospitals
CAVcardiac allograft vasculopathy
CBICatheter Based Intervention
CBPcomplete blood picture
CBTcognitive behavioral therapy
CBT-Icognitive behavioral therapy for insomnia
CCAC. difficile cytotoxicity assay
CCCcomplete concentric collapse
CCHchronic cluster headache
CCJcraniocervical junction
CCMcerebral cavernous malformation
CCPcyclic citrullinated peptide
CCPDMAcomplete circumferential peripheral and deep margin assessment
CCR7C-C chemokine receptor type 7
CCRCCclear cell renal cell carcinoma
CCRTconcurrent chemoradiotherapy
CCS gradeCanadian Cardiovascular Society grade
CCTclinical controlled trial
CCTAcoronary computed tomography angiography
CD20cluster of differentiation 20
CD4cluster of differentiation 4
CDAICrohn’s disease activity index
CDCCenters for Disease Control and Prevention
CDEISCrohn’s disease index of severity
CDHcongenital diaphragmatic hernia
CDHISCrohn’s Disease Histological Index of Severity
CDIClostridium difficile infection
CDKcyclin-dependent kinase
CDMRCesarean Delivery at Maternal Request
cDNA-AFLPcDNA-amplified restriction fragment–length polymorphism
CDPcontractile deceleration point
CDPASconsumer directed personal assistance services
CDTcarbohydrate‐deficient transferrin
CDVAcorrected distance visual acuity
ce-CMRcontrast-enhanced cardiac magnetic resonance
CEAcarcinoembryonic antigen
CEDCervical Endoscopic Discectomy
CEUScontrast-enhanced ultrasound
CFCcardio-facio-cutaneous syndrome
CFCSCommunication Function Classification System
CFRDCystic Fibrosis Related Diabetes
CFTRcystic fibrosis transmembrane conductance regulator
CFVcontractile front velocity
CGHcomparative genomic hybridization
CGMcontinuous glucose monitoring
cGMPcyclic guanosine monophosphate
CGMScontinuous glucose monitoring system
CGPcomprehensive genomic profiling
CGRPcalcitonin gene-related peptide
CHA2DS2-VASccongestive heart failure, hypertension, age ≥ 75, diabetes mellitus, prior stroke or TIA or thromboembolism, vascular disease, age 65-74, sex category
CHDcongenital heart disease
chEVARchimney endovascular aneurysm repair
CHFcongestive heart failure
CHGchlorhexidine-gluconate
China CDCChinese Center for Disease Control and Prevention
CHLConductive Hearing Loss
CHOP INTENDChildren’s Hospital of Philadelphia Infant Test of Neuromuscular Disorders
CHRDcysteine–histidine rich domain
CICclean intermittent catheterization
CIDcompromised immune disorder
CIDPChronic Inflammatory Demyelinating Polyneuropathy
CIDTculture-independent diagnostic test
CIMcritical illness myopathy
CINcervical intraepithelial neoplasia
ciTBIclinically important traumatic brain injury
CIWAClinical Institute Withdrawal Assessment
CK18Cytokeratin 18 Fragments
CKDchronic kidney disease
CKIcyclin-dependent kinase inhibitor
CKIδcasein kinase 1 delta
CKMBcreatine kinase isoenzyme MB
CLAcutaneous lymphocyte antigen
CLADchronic lung allograft dysfunction
CLBPchronic low back pain
CLIAClinical Laboratory Improvement Amendments
CLLchronic lymphocytic leukemia
CLNDcomplete lymph node dissection
CM-AVMcapillary malformation–ateriovenous malformation syndrome
CMAPcompound muscle action potential
cmH2Ocentimeters of water
CMLchronic myeloid leukemia
CMPAcow’s milk protein allergy
CMRcardiac magnetic resonance
CMSCenters for Medicare & Medicaid Services
CMTcervical motion tenderness
CMVcontinuous mandatory ventilation
CNAcopy number alteration
CNScentral nervous system
CNVchoroidal neovascularization
CNVMchoroidal neovascular membrane
COCcertificate of coverage
COLDchronic obstructive lung disease
COMEChronic Otitis Media With Effusion
COMTcatechol-O-methyltransferase
COOGCollaborative Ocular Oncology Group
COPDchronic obstructive pulmonary disease
COScontrolled ovarian stimulation
COVID-19Coronavirus disease 2019
COWSclinical opiate withdrawal scale
COX-2cyclooxygenase 2 inhibitors
CPAcerebellopontine angle
CPAPcontinuous positive airway pressure
CPGClinical Practice Guideline
CPHPcombined pituitary hormone deficiency
CPHSSCincinnati Prehospital Stroke Scale
CPKcreatine phosphokinase
CPK-MBcreatine phosphokinase muscle bandisoenzyme
CPMcontinuous passive motion
CPNBcontinuous peripheral nerve block
CPPcerebral perfusion pressure
CPRcardiopulmonary resuscitation
CPSchild protective services
CPT-1Carnitine Palmitoyltransferase 1
CPT1Acarnitine palmitoyl transferase 1A
CRBBBcomplete right bundle branch block
CREBcAMP response element-binding protein
CREBBPCREB binding protein
CRISAcatheterization risk in adult patients
CRISPRclustered regularly interspaced short palindromic repeats
CRMcardiac rhythm management
CROScontralateral routing of signals
CRPScomplex regional pain syndrome
CRRTcontinuous renal replacement therapy
CRSchronic rhinosinusitis
CRSsNPchronic rhinosinusitis without nasal polyps
CRSTClinical Rating Scale for Tremor
CRSwNPchronic rhinosinusitis with nasal polyps
CRTconformal radiation therapy
CS-IMRTcarotid-sparing intensity-modulated radiotherapy
cSCCcutaneous squamous cell carcinoma
CSDcortical spreading depression
CSIcarniospinal irradiation
CSMcervical spondylotic myelopathy
cSNPcoding single-nucleotide polymorphism
CSScancer-specific survival
CTABclear to auscultation bilaterally
CTAPcomputerized tomography of the abdomen and pelvis
CTCcirculating tumor cell
ctDNAcirculating tumour DNA
CTEcomputed tomography enterography
CTGFconnective tissue growth factor
CTHcomputed tomography of head
CTOcoronary total occlusion
CTPACT pulmonary angiography
CTScarpal tunnel syndrome
CTVclinical target volume
CTXcarboxy-terminal telopeptide of type 1 collagen
CURB-65confusion, BUN, respiration rate, BP, Age 65+
CVAcerebrovascular accident
CVATcostovertebral angle tenderness
CVCcentral venous catheter
CVICUCardiovascular Intensive Care Unit
CVIDcommon variable immunodeficiency
CVPcentral venous pressure
CVSTcerebral venous sinus thrombosis
CYSChild & Youth Services