2026 data ClinicalTrials.gov official source

Conditions: C

Compiled by PlainTrial Editorial, Clinical Trial Intelligence Editorial Team · January 1, 2026

Every condition beginning with C that has a registered US clinical trial, with how many studies cover each.

2,954 conditions starting with "C"

Showing 2,551–2,600 of 2,954

Condition	Trials	Recruiting
Corneal Degeneration	1	-
Corneal Disease	3	-
Corneal Diseases	2	2
Corneal Dystrophies, Hereditary	1	-
Corneal Dystrophy	2	2
Corneal Dystrophy, Band-Shaped	1	-
Corneal Ectasia	4	1
Corneal Edema	5	2
Corneal Edema Secondary to Corneal Endothelial Dystrophy	1	-
Corneal Endothelial Dysfunction	1	1
Corneal Endothelial Dystrophy	1	-
Corneal Epithelial Degeneration	1	-
Corneal Epithelial Disorders	2	1
Corneal Epithelial Wound Healing	1	1
Corneal Epithelium Defect	1	-
Corneal Exposure	1	1
Corneal Graft Failure	1	-
Corneal Neovascularization	4	1
Corneal Opacity	3	2
Corneal Scar	1	1
Corneal Staining	1	-
Corneal Swelling	1	-
Corneal Transplant	1	-
Corneal Transplant Failure	2	1
Corneal Transplant Rejection	1	-
Corneal Ulcer	2	2
Corneal Wound Healing	1	-
Cornelia de Lange Syndrome	2	2
Corona Virus Infection	16	5
Coronary Aneurysm	1	-
Coronary Angiography	2	1
Coronary Arterial Disease (CAD)	6	5
Coronary Arteriosclerosis	12	-
Coronary Artery Bypass	4	3
Coronary Artery Bypass Graft	2	-
Coronary Artery Bypass Graft (CABG)	2	1
Coronary Artery Bypass Graft and/or Aortic Valve Replacement Surgery	1	-
Coronary Artery Bypass Graft Surgery	2	-
Coronary Artery Bypass Graft Surgery Patients	1	-
Coronary Artery Bypass Grafting	3	2
Coronary Artery Bypass Grafting Surgery (CABG)	1	1
Coronary Artery Calcification	5	1
Coronary Artery Disease	220	57
Coronary Artery Disease (CAD)	6	2
Coronary Artery Diseases	1	-
Coronary Artery Lesions	1	1
Coronary Artery Stenoses	1	-
Coronary Artery Stenosis	5	1
Coronary Artery Vasospasm	1	-
Coronary Atherosclerosis	6	2

Data sourced from official public datasets. See our methodology for details.