Canavan Disease   3 studies
Carcinoid Syndrome   7 studies
Carcinoid Tumor   104 studies
Carcinoma, Squamous Cell   690 studies
Carcinoma, Squamous Cell of Head and Neck   165 studies
Cardiogenital Syndrome   1 study
Cardiospasm   11 studies
Carney Syndrome   2 studies
Carnitine Palmitoyl Transferase 2 Deficiency   1 study
Caroli Disease   1 study
Castleman's Disease   8 studies
Cataplexy   9 studies
Central Nervous System Lymphoma, Primary   168 studies
Central Serous Chorioretinopathy   12 studies
Centrotemporal Epilepsy   2 studies
Ceramide Trihexosidosis   45 studies
Cerebellar Ataxia   4 studies
Cerebellar Degeneration   1 study
Cerebral Aneurysm   8 studies
Cerebrospinal Fluid Leak   1 study
Cerebrotendinous Xanthomatosis   2 studies
Ceroid Lipofuscinosis, Neuronal 2   3 studies
Cervical Intraepithelial Neoplasia   73 studies
Chagas Disease   8 studies
Chalazion   1 study
Chandler's Syndrome   2 studies
Charcot Marie Tooth Disease   7 studies
Charcot-Marie-Tooth Disease With Pyramidal Features, Autosomal Dominant   1 study
Charcot-Marie-Tooth Disease, Type 1A   2 studies
Chediak-Higashi Syndrome   8 studies
Chikungunya   1 study
Childhood Disintegrative Disorder   2 studies
Childhood-Onset Schizophrenia   6 studies
Cholecystitis   19 studies
Cholera   21 studies
Cholestasis   29 studies
Chondrocalcinosis 2   1 study
Chondrosarcoma   45 studies
Chordoma   15 studies
Chorea Minor   2 studies
Choreoacanthocytosis   1 study
Choriocarcinoma   46 studies
Chorioretinitis   1 study
Choroid Plexus Neoplasms   77 studies
Choroideremia   1 study
Choroiditis   4 studies
Chromophil Renal Cell Carcinoma   14 studies
Chronic Berylliosis   2 studies
Chronic Granulomatous Disease   24 studies
Chronic Inflammatory Demyelinating Polyneuropathy   6 studies
Chronic Lymphocytic Leukemia   904 studies
Chronic Myelogenous Leukemia   712 studies
Chronic Myelomonocytic Leukemia   295 studies
Chronic Myeloproliferative Disorders   178 studies
Chronic Neutropenia   2 studies
Chronic, Infantile, Neurological, Cutaneous, Articular Syndrome   5 studies
Churg-Strauss Syndrome   12 studies
Chylothorax, Congenital   1 study
Cicatricial Pemphigoid   2 studies
Clear Cell Renal Cell Carcinoma   83 studies
Clostridium Difficile   36 studies
Cluster Headaches   13 studies
COACH Syndrome   1 study
Coal Worker's Pneumoconiosis   1 study
Coats Disease   2 studies
Coccidioidomycosis   10 studies
Cockayne's Syndrome   1 study
Cogan's Syndrome   1 study
Cold Agglutinin Disease   1 study
Collagenous Colitis   4 studies
Colorectal Cancer, Hereditary Nonpolyposis, Type 1   11 studies
Combined Hyperlipidemia, Familial   19 studies
Common Variable Immunodeficiency   13 studies
Compartment Syndrome   8 studies
Complete Atrioventricular Canal   3 studies
Conductive Hearing Loss   2 studies
Condyloma   8 studies
Condyloma Acuminatum   22 studies
Cone Rod Dystrophy   35 studies
Congenital Amegakaryocytic Thrombocytopenia   5 studies
Congenital Cardiovascular Malformations   1 study
Congenital Central Hypoventilation Syndrome   1 study
Congenital Cytomegalovirus   7 studies
Congenital Deafness   2 studies
Congenital Diaphragmatic Hernia   7 studies
Congenital Fiber Type Disproportion   1 study
Congenital Heart Block   3 studies
Congenital Heart Septum Defect   30 studies
Congenital Hemolytic Anemia   1 study
Congenital Hepatic Fibrosis   2 studies
Congenital Hypothyroidism   4 studies
Congenital Megacolon   3 studies
Congenital Torticollis   2 studies
Congenital Toxoplasmosis   1 study
Conn's Syndrome   8 studies
Conotruncal Anomaly Face Syndrome   15 studies
Conotruncal Heart Malformations   2 studies
Conversion Disorder   4 studies
Corneal Dystrophy   5 studies
Corneal Dystrophy Fuchs' Endothelial 1   6 studies
Corneal Dystrophy, Epithelial Basement Membrane   1 study
Coronary Artery Aneurysm   2 studies
Corticobasal Degeneration   1 study
Cowden's Disease   3 studies
Craniofrontonasal Dysplasia   1 study
Craniosynostosis   7 studies
Cretinism   4 studies
Creutzfeldt Jakob Disease   2 studies
Crigler Najjar Syndrome, Type 1   1 study
Crohn's Disease   269 studies
Crohn’s Disease, Pediatric   9 studies
Cryptococcosis   23 studies
Cryptosporidiosis   19 studies
Currarino Triad   1 study
Cutaneous Lupus Erythematosus   7 studies
Cutaneous T-cell Lymphoma   365 studies
Cutis Laxa   4 studies
Cutis Verticis Gyrata   8 studies
Cyclic Vomiting Syndrome   6 studies
Cystic Adenomatoid Malformation of Lung   2 studies
Cystic Fibrosis   286 studies
Cysticercosis   11 studies
Cystinosis   11 studies
Cystinuria   2 studies
Cystosarcoma Phyllodes   2 studies
Cytomegalic Inclusion Disease   132 studies
Cytomegalovirus   178 studies
Cytomegalovirus Retinitis   60 studies