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.

2,956 conditions starting with "C"

Showing 251–300 of 2,956

Condition	Trials	Recruiting
Carbohydrate Metabolism	1	1
Carcinoid	3	3
Carcinoid Intestine Tumor	1	1
Carcinoid Syndrome	5	1
Carcinoid Syndrome Diarrhea	1	1
Carcinoid Tumor	9	3
Carcinoid Tumor of Cecum	1	1
Carcinoid Tumor of Ileum	1	1
Carcinoid Tumor of Liver	1	1
Carcinoid Tumor of Pancreas	1	1
Carcinoid Tumors	1	-
Carcinoma	30	10
Carcinoma Arising From Cylindroma	1	-
Carcinoma Arising From Spiradenoma	1	-
Carcinoma Breast Stage IV	1	-
Carcinoma in Situ	5	3
Carcinoma in Situ of Bladder	1	-
Carcinoma in Situ of the Breast	1	1
Carcinoma of Endometrium	1	1
Carcinoma of Head/Neck	1	-
Carcinoma of Larynx	1	-
Carcinoma of the Appendix	2	-
Carcinoma of the Cervix, Stage IVB	1	-
Carcinoma of the Uterus	1	-
Carcinoma of the Vulva	2	-
Carcinoma of Unknown Primary	5	2
Carcinoma, Adrenal Cortical	2	2
Carcinoma, Adrenocortical	2	2
Carcinoma, Basal Cell	2	-
Carcinoma, Breast	2	1
Carcinoma, Bronchogenic	1	-
Carcinoma, Colorectal	2	1
Carcinoma, Ductal	2	-
Carcinoma, Hepatocellular	28	7
Carcinoma, Intraductal, Noninfiltrating	1	-
Carcinoma, Merkel Cell	1	1
Carcinoma, Neuroendocrine	5	4
Carcinoma, Non-Small Cell Lung	133	43
Carcinoma, Non-Small-Cell Lung (NSCLC)	2	2
Carcinoma, Non-Small-Cell Lung Cancer	1	1
Carcinoma, Non-Small-Cell Lung Cancer (NSCLC)	1	1
Carcinoma, Ovarian Epithelial	5	1
Carcinoma, Pancreatic Ductal	8	3
Carcinoma, Renal	1	1
Carcinoma, Renal Cell	35	6
Carcinoma, Renal Cell Metastasis	2	1
Carcinoma, Renal Cell, Advanced	1	1
Carcinoma, Small Cell	4	1
Carcinoma, Small Cell Lung	1	-
Carcinoma, Squamous Cell	15	6

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