2026 data ClinicalTrials.gov official source

Conditions: C

Compiled by PlainTrial, Clinical Trial Intelligence Editorial Process · 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 1,251–1,300 of 2,954

Condition	Trials	Recruiting
Choroideremia	8	3
Chrohn's Disease	1	1
Chromophobe Renal Cell Carcinoma	9	4
Chromosomal Abnormalities	1	-
Chromosomal Instability	2	1
Chromosome 15Q, Partial Deletion	1	1
Chromosome 9P Deletion Syndrome	1	1
Chromosome Aberrations	1	1
Chromosome Abnormality	1	-
Chromosome Deletion	2	-
Chronic	2	-
Chronic Abdominal Pain	1	1
Chronic Active EBV Infection of T-and NK-Cell Type, Systemic Form	1	1
Chronic Active Epstein-Barr Virus	1	1
Chronic Affective Disorders	1	-
Chronic Airway Disease	1	1
Chronic Allograft Nephropathy	2	-
Chronic Allograft Nephropathy (CAN)	1	1
Chronic Anal Fissure	1	1
Chronic Anal Fissures	1	-
Chronic Anemia	1	1
Chronic Angina	2	1
Chronic Angle Closure Glaucoma	1	-
Chronic Ankle Instability	1	-
Chronic Aortic Dissection	1	1
Chronic Asthma	1	1
Chronic Asthmatic Bronchitis	1	1
Chronic Atrial Fibrillation	1	-
Chronic Babesiosis	1	1
Chronic Back Pain	8	7
Chronic Brain Injury	1	1
Chronic Bronchitis	9	2
Chronic Bronchitis With Airway Obstruction	1	1
Chronic Cancer Pain	1	1
Chronic Cardiopulmonary Disease	1	-
Chronic Central Serous Chorioretinopathy	1	-
Chronic Condition	1	1
Chronic Conditions	2	-
Chronic Conditions, Multiple	2	-
Chronic Constipation	5	-
Chronic Coronary Disease	1	1
Chronic Coronary Insufficiency	1	-
Chronic Coronary Occlusion	1	-
Chronic Coronary Total Occlusion	1	-
Chronic Cough	3	-
Chronic Cough (CC)	1	1
Chronic Critical Illness	1	1
Chronic Cutaneous Lupus Erythematosus	2	2
Chronic Daily Headache	1	1
Chronic Disease	49	18

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