Clinical Trials Involving Rare Diseases: C
- CADASIL (20)
- CANDLE Syndrome (6)
- CD4 Deficiency (2)
- CDKL5 Deficiency Disorder (57)
- CHARGE Syndrome (1)
- CHD2 Myoclonic Encephalopathy (1)
- CHILD Syndrome (6)
- CLIPPERS (2)
- CLOVES Syndrome (2)
- Calciphylaxis (15)
- Camurati-Engelmann Disease (102)
- Canavan Disease (9)
- Candida Glabrata (2)
- Carbamoyl Phosphate Synthetase 1 Deficiency (8)
- Carcinoid Syndrome (69)
- Carcinoid Tumor (217)
- Cardiac Rupture (4)
- Cardiofaciocutaneous Syndrome (2)
- Cardiomyopathy Due to Anthracyclines (2)
- Cardiospasm (105)
- Carney Complex (4)
- Carnitine Palmitoyltransferase 2 Deficiency (5)
- Caroli Disease (3)
- Carotid Body Tumor (110)
- Carpenter Syndrome (2)
- Cartilage-hair Hypoplasia (2)
- Castleman Disease (34)
- Cat Scratch Disease (2)
- Catastrophic Antiphospholipid Syndrome (2)
- Catecholaminergic Polymorphic Ventricular Tachycardia (9)
- Cauda Equina Syndrome (5)
- Caudal Regression Sequence (2)
- Central Centrifugal Cicatricial Alopecia (8)
- Central Congenital Hypothyroidism (2)
- Central Core Disease (1)
- Central Diabetes Insipidus (10)
- Central Nervous System Germinoma (18)
- Central Neurocytoma (3)
- Central Pain Syndrome (5)
- Central Serous Chorioretinopathy (68)
- Centronuclear Myopathy (14)
- Cerebellar Astrocytoma, Childhood (94)
- Cerebellar Ataxia Ectodermal Dysplasia (1)
- Cerebellar Ataxia and Hypogonadotropic Hypogonadism (1)
- Cerebellar Degeneration (6)
- Cerebellar Hypoplasia (1)
- Cerebellar Liponeurocytoma (1)
- Cerebral Astrocytoma, Childhood (90)
- Cerebral Palsy Ataxic (2)
- Cerebral Palsy Athetoid (2)
- Cerebral Palsy Spastic Hemiplegic (14)
- Cerebrospinal Fluid Leak (45)
- Cerebrotendinous Xanthomatosis (10)
- Cervical Dystonia (99)
- Cervical Intraepithelial Neoplasia (343)
- Chanarin-Dorfman Syndrome (6)
- Chandler's Syndrome (25)
- Chaotic Atrial Tachycardia (2)
- Charcot-Marie-Tooth Disease (435)
- Charcot-Marie-Tooth Disease Type 1 (12)
- Charcot-Marie-Tooth Disease Type 1A (18)
- Charcot-Marie-Tooth Disease Type 1B (3)
- Charcot-Marie-Tooth Disease Type 2 (2)
- Charcot-Marie-Tooth Disease Type 2A (3)
- Charles Bonnet Syndrome (3)
- Chediak-Higashi Syndrome (13)
- Cherubism (2)
- Chiari Malformation Type 2 (55)
- Chikungunya (60)
- Childhood Acute Lymphoblastic Leukemia (563)
- Childhood Apraxia of Speech (7)
- Childhood Brain Stem Glioma (102)
- Childhood Disintegrative Disorder (2)
- Childhood Hepatocellular Carcinoma (12)
- Childhood Hypophosphatasia (1)
- Childhood Supratentorial Embryonal Tumor, Not Otherwise Specified (86)
- Childhood-Onset Schizophrenia (7)
- Children's Interstitial Lung Disease (2)
- Cholecystitis (179)
- Cholera (73)
- Cholesteatoma (17)
- Cholesteryl Ester Storage Disease (30)
- Chondroblastoma (1)
- Chondrodysplasia Punctata Syndrome (3)
- Chondroma (2)
- Chondrosarcoma (104)
- Chordoid Glioma of the Third Ventricle (2)
- Chordoma (57)
- Chorea-acanthocytosis (1)
- Choriocarcinoma (66)
- Chorioretinitis (10)
- Choroid Plexus Carcinoma (11)
- Choroid Plexus Papilloma (1)
- Choroideremia (24)
- Choroiditis (41)
- Chromophil Renal Cell Carcinoma (45)
- Chromophobe Renal Cell Carcinoma (11)
- Chromosomal Triplication (74)
- Chromosome 15q Duplication (2)
- Chromosome 17p Deletion (19)
- Chromosome 1p36 Deletion Syndrome (2)
- Chromosome 1q21.1 Duplication Syndrome (1)
- Chromosome 3q29 Microduplication Syndrome (1)
- Chromosome 5q Deletion (12)
- Chromosome 7q Duplication (1)
- Chromosome 9p Deletion (1)
- Chronic Active Epstein-Barr Virus Infection (3)
- Chronic Eosinophilic Pneumonia (1)
- Chronic Erosive Gastritis (1)
- Chronic Graft Versus Host Disease (196)
- Chronic Granulomatous Disease (67)
- Chronic Inflammatory Demyelinating Polyneuropathy (68)
- Chronic Intestinal Pseudoobstruction (5)
- Chronic Lymphocytic Leukemia (1,891)
- Chronic Myeloid Leukemia (1,237)
- Chronic Myelomonocytic Leukemia (544)
- Chronic Myeloproliferative Disorders (1,837)
- Chronic Neutrophilic Leukemia (111)
- Chronic Progressive External Ophthalmoplegia (6)
- Chronic Recurrent Multifocal Osteomyelitis (4)
- Chronic Thromboembolic Pulmonary Hypertension (96)
- Chylothorax, Congenital (1)
- Ciguatera Fish Poisoning (1)
- Citrullinemia Type I (4)
- Classic Galactosemia (10)
- Clear Cell Renal Cell Carcinoma (1,267)
- Cloacal Exstrophy (1)
- Coal Worker's Pneumoconiosis (37)
- Coats Disease (8)
- Cocaine Antenatal Exposure (2)
- Coccidioidomycosis (78)
- Coccygodynia (6)
- Cockayne Syndrome (8)
- Coffin-Lowry Syndrome (1)
- Cogan's Syndrome (4)
- Cohen Syndrome (1)
- Cold Agglutinin Disease (12)
- Cold Urticaria (14)
- Collecting Duct Carcinoma (11)
- Colloid Cysts of Third Ventricle (1)
- Coloboma of Optic Nerve (2)
- Common Variable Immunodeficiency (47)
- Compartment Syndrome (94)
- Complement Component 5 Deficiency (1)
- Complement Component Deficiency (1)
- Complete Androgen Insensitivity Syndrome (2)
- Complete Atrioventricular Canal (4)
- Complex Regional Pain Syndrome (140)
- Cone Dystrophy (28)
- Cone-rod Dystrophy (17)
- Cone-rod Dystrophy 2 (15)
- Congenital Adrenal Hyperplasia (129)
- Congenital Amegakaryocytic Thrombocytopenia (8)
- Congenital Amputation (3)
- Congenital Aplastic Anemia (94)
- Congenital Central Hypoventilation Syndrome (9)
- Congenital Contractural Arachnodactyly (1)
- Congenital Cytomegalovirus (43)
- Congenital Diaphragmatic Hernia (69)
- Congenital Disorders of Glycosylation (9)
- Congenital Dyserythropoietic Anemia (6)
- Congenital Dyserythropoietic Anemia Type 1 (2)
- Congenital Erythropoietic Porphyria (52)
- Congenital Fiber Type Disproportion (1)
- Congenital Fibrosis of Extraocular Muscles (1)
- Congenital Generalized Lipodystrophy (11)
- Congenital Heart Block (6)
- Congenital Hemolytic Anemia (5)
- Congenital Hepatic Fibrosis (3)
- Congenital Herpes Simplex (6)
- Congenital Human Immunodeficiency Virus (1)
- Congenital Hyperinsulinism (47)
- Congenital Hypopituitarism (1)
- Congenital Hypothyroidism (13)
- Congenital Insensitivity to Pain (1)
- Congenital Lymphedema (11)
- Congenital Mesoblastic Nephroma (7)
- Congenital Mirror Movement Disorder (3)
- Congenital Muscular Dystrophy (13)
- Congenital Muscular Dystrophy Due to Dystroglycanopathy (3)
- Congenital Muscular Dystrophy Type 1A (4)
- Congenital Myasthenic Syndromes (11)
- Congenital Myotonic Dystrophy (5)
- Congenital Pseudoarthrosis (4)
- Congenital Rubella (2)
- Congenital Sucrase-isomaltase Deficiency (4)
- Congenital Thrombotic Thrombocytopenic Purpura (7)
- Congenital Torticollis (11)
- Congenital Tracheal Stenosis (1)
- Congenital Vertical Talus (1)
- Congenital Zika Syndrome (2)
- Congenitally Corrected Transposition of the Great Arteries (2)
- Conotruncal Heart Malformations (3)
- Continuous Spike-wave During Slow Sleep Syndrome (6)
- Conversion Disorder (145)
- Corneal Endothelial Dystrophy Type 2 (9)
- Cornelia De Lange Syndrome (4)
- Coronary Artery Aneurysm (17)
- Corpus Callosum Agenesis (15)
- Corticobasal Degeneration (35)
- Costello Syndrome (3)
- Cowden Syndrome (7)
- Cramp-fasciculation Syndrome (1)
- Cranioectodermal Dysplasia (1)
- Craniofacial Microsomia (9)
- Craniofrontonasal Dysplasia (1)
- Craniopharyngioma (105)
- Craniosynostosis (55)
- Creutzfeldt-Jakob Disease (7)
- Cri Du Chat Syndrome (1)
- Crigler Najjar Syndrome, Type 1 (12)
- Crouzon Syndrome (42)
- Crusted Scabies (1)
- Cryoglobulinemic Vasculitis (8)
- Cryopyrin-associated Periodic Syndrome (29)
- Cryptococcosis (62)
- Cryptogenic Organizing Pneumonia (3)
- Cryptosporidiosis (27)
- Currarino Triad (1)
- Cushing's Syndrome (91)
- Cutaneous Lupus Erythematosus (57)
- Cutaneous Mastocytosis (10)
- Cutaneous Polyarteritis Nodosa (1)
- Cutaneous Sclerosis (2)
- Cutaneous T-cell Lymphoma (484)
- Cutaneous-skeletal Hypophosphatemia Syndrome (1)
- Cutis Laxa (88)
- Cystic Adenomatoid Malformation of Lung (4)
- Cystic Fibrosis (1,313)
- Cysticercosis (28)
- Cystinosis (29)
- Cystinuria (23)
- Cytomegalic Inclusion Disease (348)
- Cytomegalovirus Retinitis (64)