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 601–650 of 2,954

Condition	Trials	Recruiting
CBCL	1	1
CBD	9	3
CBL Syndrome	1	1
CBT	3	2
CCHS	1	1
CCHS With Hirschsprung Disease	1	1
CCHS With Neural Crest Tumor	1	1
CCHS With Neuroblastoma	1	1
CCM Therapy	1	-
CCND1 Positive	2	-
CCND1 Protein Overexpression	1	-
CCND2 Positive	1	-
CCND3 Positive	1	-
CCNE1 Amplification	2	2
CCNE1 Amplified Advanced Solid Tumors	1	1
ccRCC	2	1
CCT	1	-
CCUS Clonal Cytopenia of Undetermined Significance	2	2
CD 19+ Acute Leukemia	1	-
CD-30 Positive Anaplastic Large T-cell Cutaneous Lymphoma	1	-
CD19 Positive	5	1
CD19+ Acute Leukemia	1	-
CD20 Positive	6	-
CD20+ Lymphoblastic Lymphoma	1	1
CD30-Positive Diffuse Large B-Cell Lymphoma	1	1
CD30-Positive Neoplastic Cells Present	1	1
CD33 Expressing Hematological Malignancies	1	-
CD40 Ligand Deficiency	2	1
CD40L-HyperIgM Syndrome	1	1
CD5 Positive	1	-
CD73 Deficiency	1	-
CDD	1	1
CDI	3	1
CDK12 Gene Mutation	1	-
CDKL5	1	1
CDKL5 Deficiency Disorder	2	1
CDKL5 Deficiency Disorder (CDD)	1	1
CDKN2A Mutation	1	1
CDM	1	1
Celiac Disease	25	14
Celiac Disease in Children	3	3
Celiac Ganglia	1	-
Celiac Sprue	1	-
Cell Cancer, Squamous	1	-
Cell Phone Use	1	1
Cell Therapy	4	3
Cell-free DNA	3	2
Cellular Congenital Mesoblastic Nephroma	1	-
Cellular Ependymoma	1	-
Cellular Pathology	1	1

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