URMC / Encyclopedia / Collection CA 125 CA 15-3 CA 19-9 CA 27-29 Calcitonin Calcium (Blood) Calcium (Urine) Campylobacter Culture (Stool) Cannabinoid Screen and Confirmation (Urine) Carbon Dioxide (Blood) Carbon Monoxide (Blood) Carcinoembryonic Antigen Cardiac Biomarkers (Blood) Cardiac Catheterization Cardiac Resynchronization Therapy Cardiolipin Antibody Carotid Angioplasty and Stenting Carotid Artery Duplex Scan Carotid Endarterectomy Carpal Tunnel Release Cataract Surgery Catecholamines (Blood) Catecholamines (Urine) Catheter Ablation CCP CD4-CD8 Ratio Cecostomy for Children Cerebral Angiogram Ceruloplasmin (Blood) Cervical Biopsy Cervical Disk Replacement Surgery Cesarean Section Chemical Cardioversion Chest Fluoroscopy Chest Ultrasound Chest X-Ray Chlamydia Pneumoniae (Swab) Chlamydia Trachomatis (Swab) Chlamydia Trachomatis (Urine) Chlorhexidine (CHG) Bathing to Prevent Healthcare-Linked Infections Chloride Chloride (Urine) Cholecystectomy Cholesterol Cholinesterase (Blood) Chorionic Villus Sampling (CVS) Chromosome Analysis Circumcision for Children Clavicle Fracture Open Reduction and Internal Fixation Clinical Genetic Testing Clonazepam Level (Blood) Clostridioides Difficile Toxin (Stool) Coarctation of the Aorta Transcatheter Repair Cocaine Screen Cochlear Implant Surgery Colectomy Colonoscopy Colostomy Colposcopy Complement C3 (Blood) Complement C4 (Blood) Complete Blood Count Complete Blood Count with Differential Complete Urinalysis Comprehensive Metabolic Panel Computed Tomography (CT) Scan of the Bones Computed Tomography (CT) Scan of the Brain Computed Tomography (CT) Scan of the Spine Computed Tomography Angiography Congenital Aortic Stenosis Surgery for Children: Ross Procedure Congenital Pulmonary Stenosis Balloon Valvuloplasty Congenital Pulmonary Stenosis Surgery Corneal Ring Implants Corneal Transplantation Coronary Artery Bypass Graft Surgery Cortisol (Blood) Cortisol (Urine) COVID-19 Antibody Test C-Peptide (Blood) C-Peptide (Urine) Craniotomy C-Reactive Protein (Blood) Creatine Kinase (Blood) Creatine Kinase MB (Blood) Creatine Kinase MB/Creatine Kinase Ratio Creatine Kinase with Isoenzymes (Blood) Creatinine (Blood) Creatinine (Urine) Creatinine Clearance Cryofibrinogen Cryoglobulin Cryotherapy for Prostate Cancer CT Enterography CT Scan of the Abdomen CT Scan of the Chest CT Scan of the Kidney CT Scan of the Liver and Biliary Tract CT Scan of the Pancreas Cystatin C Cystic Fibrosis Genetic Carrier Testing Cystic Fibrosis Sweat Test Cystography Cystometry Cystoscopy for Men Cystoscopy for Women Cytomegalovirus (Amniotic Fluid) Cytomegalovirus (Blood) Cytomegalovirus (Urine) TB Culture