- C-14 urea breath test
- C3 C4
- Ca
- CA
- Ca++
- Ca2+
- Cabot rings
- Caffeine
- Calcification(s)
- Calcitonin and Calcitonin Stimulation Tests
- Calcium
- Calcium, Blood
- Calcium, Ionized
- Calcium, Urine
- Calcium oxalate crystal
- Calculus
- Calculus, Kidney Stone Panel
- Campylobacter
- cancer antigen 125 (CA 125)
- cancer antigen 15-3 (CA 15-3)
- cancer antigen 19-9 (CA 19-9)
- cancer antigen 27.29 (CA 27.29)
- Cancer Antigens: CA 15-3, CA 19-9, CA 125, and Carcinoembryonic
- Cancer staging
- Candida albicans
- Candida spp
- cannabinoids (THC)
- capillary blood gases
- Capsule Endoscopy
- Carbamazepine
- Carbamazepinum
- Carbategretal
- Carbatrol
- Carbazep
- Carbohydrate diet
- Carbon dioxide
- Carbon Dioxide
- Carbonic acid
- Carbon monoxide
- Carbon monoxide poisoning
- Carboxyhemoglobin
- Carcinoembryonic antigen (CEA)
- Carcinoid syndrome
- Carcinoma
- Carcinomatosis
- cardiac angiography
- Cardiac arrest, magnesium
- Cardiac blood pool scan
- cardiac catheterization
- Cardiac chamber disorder
- Cardiac cycle
- Cardiac disorder(s)
- Cardiac failure. See also Congestive heart failure
- Cardiac hypertrophy
- Cardiac muscle
- Cardiac neoplasm
- Cardiac output, decreased
- Cardiac pacemaker
- cardiac plaque CT
- Cardiac trauma
- Cardiac troponin
- cardiac troponin I (cTnI)
- cardiac troponin T (cTnT)
- Cardiomyopathy
- Cardiotonic therapy
- Cardiovascular disease
- Carnitine uptake disorder
- carotene; vitamin B1: thiamine; vitamin B6: niacin
- Carotid angiogram
- carotid arteriography
- Carotid Doppler
- carotid ultrasound
- Carpal tunnel syndrome
- Cast(s)
- Cat's eye syndrome
- Cataract
- Catecholamine
- Catecholamines, Blood and Urine
- Catheter. See also Indwelling catheter
- Catheterization, urinary
- Cation
- Cat scratch fever
- CBC
- CBZ
- CD4/CD8 Enumeration
- CDC (Centers for Disease Control)
- Celiac disease
- Centers for Disease Control (CDC)
- Central nervous system (CNS)
- Central nervous system disorder
- Central nervous system tumor
- Cerebral infarction
- Cerebrospinal fluid (CSF)
- Cerebrospinal Fluid Analysis
- Cerebrovascular accident (CVA)
- Ceruloplasmin
- Ceruloplasmin (Cp)
- Cervical biopsy
- Cervical cancer
- Cervical cord lesion
- Cervical LEEP
- cervical smear
- Cetaphen
- CH100
- CH50
- Chalasia
- Challenge test
- Chancroid
- Chemotherapy
- Chest
- Chest CT
- Chest MRI
- Chest pain
- Chest radiography
- Chest wall trauma
- Chest X-Ray
- chickenpox
- Chickenpox
- Child
- Chlamydia
- Chlamydia Group Antibody
- Chlamydia trachomatis
- Chloride
- Chloride, Blood
- Chloride, Sweat
- Cholangiocarcinoma
- Cholangiography
- Cholangiography, Percutaneous Transhepatic
- Cholangiopancreatography, Endoscopic Retrograde
- Cholangitis
- Cholecalciferol
- Cholecystitis
- Cholelithiasis
- cholescintigraphy
- Cholestasis
- Cholesterol
- Cholesterol, HDL and LDL
- Cholesterol, Total
- Cholinergics
- Chondromalacia
- Chorea
- Chorionic gonadotropin
- Chorionic gonadotropin, human
- Choroidal nevus
- Chromosome Analysis, Blood
- Chronic bronchitis
- Chronic glomerulonephritis
- Chronic infection
- Chronic kidney disease (CKD)
- Chronic obstructive pulmonary disease (COPD)
- Chronic pulmonary disease
- Chronic renal failure (CRF)
- CHS
- Cibalith-S
- Cimetidine
- cineangiocardiography
- Cine scanning
- Circadian rhythm
- Circulating anticoagulant
- Circulating fibrinogen
- Cirrhosis
- Citrullinemia type I
- CKD (chronic kidney disease)
- CK isoenzymes
- Cl-
- Claustrophobia
- Clean-catch specimen. See also Urine specimen
- Cleaning, isolation precautions
- Clomiphene
- Closing volume
- Clostridium
- Clot Retraction
- Clue cell
- CMG
- CMV
- CO
- CO2
- CO2 combining power
- Coagulation defect
- Coagulation factors
- Coagulopathy
- cocaine
- Cocaine abuse
- Coccidioidomycosis
- Co-Dax
- Codocyte
- COH
- COHb
- Cold Agglutinin Titer
- Cold hemagglutinin disease
- Colitis
- Collagen Cross-Linked N-Telopeptide
- Collagen disease/disorder
- Colon. See also Colitis
- Colon cancer. See also Colorectal cancer
- Colonic polyp
- Colonoscopy
- Color blindness test
- Colorectal cancer. See also Colon cancer
- Color Perception Test
- Colposcopy
- ComaHepatic coma
- Comizial
- Common bile duct dilation
- Common bile duct obstruction
- Common vehicle transmission of pathogen
- Complement C3 and Complement C4
- Complement protein
- Complete Blood Count, Hematocrit
- Complete Blood Count, Platelet Count
- Complete Blood Count, RBC Count
- Complete Blood Count, RBC Indices
- Complete Blood Count, RBC Morphology and Inclusions
- Complete Blood Count, WBC Count and Differential
- Complete blood count (CBC)
- compound F
- Compression fracture, vertebroplasty
- Computed axial tomography (CAT)
- Computed axial tomography (CAT) angiography
- Computed axial tomography (CAT) of the head
- Computed Tomography, Abdomen
- Computed Tomography, Angiography
- Computed Tomography, Brain
- Computed Tomography, Cardiac Scoring
- Computed Tomography, Colonoscopy
- Computed Tomography, Pelvis
- Computed Tomography, Pituitary
- Computed Tomography, Renal
- Computed Tomography, Spine
- Computed Tomography, Spleen
- Computed Tomography, Thoracic
- Computed tomography (CT)
- computed transaxial tomography
- computed transaxial tomography (CTT)
- computed transaxial tomography (CTT) of the head
- Condyloma
- Cone Biopsy
- Confusion
- Congenital adrenal hyperplasia (CAH)
- Congenital anomaly
- Congenital dyserythropoietic anemia
- Congenital heart disease
- Congenital hypothyroidism
- Congenital nephrosis, AFP in
- Congenital nonspherocytic anemia
- Congenital renal anomaly
- Congestive heart failure
- Conjugated/direct bilirubin
- Conjunctivitis
- Connecting peptide insulin
- Connective tissue disease
- Contact dermatitis
- Contact precautions
- Contraction stress test (CST)
- Contrast medium. See also specific agent
- Contusion
- Convulsion
- Coombs' antiglobulin
- Coombs' Antiglobulin, Direct
- Coombs' Antiglobulin, Indirect
- Copper
- Copper oxidase
- Coproporphyrin
- cord blood gases
- Core biopsy, breast
- Cornea
- coronary angiography
- coronary arteriography
- Coronary artery calcification
- Coronary artery disease (CAD)
- Coronary blood flow
- Corticotropin
- Corticotropin-releasing hormone (CRH) stimulation
- Cortisol
- Cortisol and Challenge Tests
- Corynebacterium
- Corynebacterium diphtheriae
- Cosyntropin
- Cough
- Cough medicine
- Cp
- Cp (ceruloplasmin)
- C-Peptide
- Craniopharyngioma
- C-Reactive Protein
- Creatine Kinase and Isoenzymes
- Creatinine
- Creatinine, Urine, and Creatinine Clearance, Urine
- Creatinine clearance test
- Creutzfeldt-Jakob disease
- CRH (corticotropin-releasing hormone)
- Cri du chat syndrome
- Crohn's disease
- CRP
- Crush injury
- Cryo
- Cryoglobulin
- Cryoglobulinemia
- Cryptorchidism
- Crystal(s)
- Crystallization, amniotic fluid
- CSF analysis
- CSF tau protein amyloid-42
- CST (contraction stress test)
- CTA
- CT colonography
- CT myelogram
- CTT
- CT virtual colonoscopy
- Cu
- Culture
- Culture, Bacterial, Anal/Genital, Ear, Eye, Skin, and Wound
- Culture, Bacterial, Blood
- Culture, Bacterial, Stool
- Culture, Bacterial, Throat or Nasopharyngeal
- Culture, Bacterial, Urine
- Culture, Fungal
- Culture, Viral
- Culture and Smear, Mycobacteria
- Cushing's disease
- Cushing's syndrome
- CXR
- Cyanocobalamin
- Cyanosis
- Cyclic antidepressants: amitriptyline
- Cyclosporine
- Cyclosporine (Sandimmune)
- Cyst(s)
- Cystic fibrosis
- Cystine crystals
- Cystinosis
- Cystitis
- Cystography
- Cystometry
- Cystoscopy
- Cystoureterography
- Cystourethrography, Voiding
- cytogenic marker for bladder cancer
- Cytology
- Cytology, Sputum
- Cytomegalovirus (CMV)
- Cytoplasmic antineutrophil cytoplasmic antibody (c-ANCA)
- Cytotoxic agents
- Cytyc ThinPrep PapTest