- Cachexia - 27 Studies
- CADASIL - 10 Studies
- Cadaver - 13 Studies
- Calcinosis - 25 Studies
- Calciphylaxis - 10 Studies
- Calcium Metabolism Disorders - 25 Studies
- Calculi - 25 Studies
- Callosities - 7 Studies
- Campylobacter Infections - 8 Studies
- Camurati-Engelmann Disease - 25 Studies
- Canavan Disease - 6 Studies
- Candidemia - 25 Studies
- Candidiasis - 25 Studies
- Candidiasis, Chronic Mucocutaneous - 4 Studies
- Candidiasis, Invasive - 25 Studies
- Candidiasis, Oral - 27 Studies
- Candidiasis, Vulvovaginal - 25 Studies
- CANDLE Syndrome - 4 Studies
- Capillary Hemangioblastoma - 11 Studies
- Capillary Leak Syndrome - 2 Studies
- Capsule Opacification - 25 Studies
- Carbamoyl-Phosphate Synthase I Deficiency Disease - 7 Studies
- Carbohydrate Metabolism, Inborn Errors - 25 Studies
- Carbon Monoxide Poisoning - 22 Studies
- Carbuncle - 2 Studies
- Carcinogenesis - 25 Studies
- Carcinoid Syndrome - 25 Studies
- Carcinoma in Situ - 25 Studies
- Carcinoma, Acinar Cell - 25 Studies
- Carcinoma, Adenoid Cystic - 25 Studies
- Carcinoma, Adenosquamous - 25 Studies
- Carcinoma, Basal Cell - 26 Studies
- Carcinoma, Ductal - 25 Studies
- Carcinoma, Ductal, Breast - 25 Studies
- Carcinoma, Embryonal - 25 Studies
- Carcinoma, Endometrioid - 25 Studies
- Carcinoma, Giant Cell - 3 Studies
- Carcinoma, Intraductal, Noninfiltrating - 25 Studies
- Carcinoma, Islet Cell - 25 Studies
- Carcinoma, Large Cell - 23 Studies
- Carcinoma, Lobular - 25 Studies
- Carcinoma, Medullary - 25 Studies
- Carcinoma, Merkel Cell - 25 Studies
- Carcinoma, Mucoepidermoid - 25 Studies
- Carcinoma, Neuroendocrine - 25 Studies
- Carcinoma, Pancreatic Ductal - 26 Studies
- Carcinoma, Papillary - 24 Studies
- Carcinoma, Signet Ring Cell - 8 Studies
- Carcinoma, Small Cell - 25 Studies
- Carcinoma, Transitional Cell - 25 Studies
- Carcinoma, Verrucous - 25 Studies
- Carcinosarcoma - 25 Studies
- Cardiac Complexes, Premature - 24 Studies
- Cardiac Output, High - 11 Studies
- Cardiac Output, Low - 27 Studies
- Cardiac Tamponade - 4 Studies
- Cardio-Renal Syndrome - 25 Studies
- Cardiomegaly - 25 Studies
- Cardiomyopathies - 25 Studies
- Cardiomyopathy, Dilated - 25 Studies
- Cardiomyopathy, Hypertrophic - 27 Studies
- Cardiomyopathy, Hypertrophic, Familial - 6 Studies
- Cardiomyopathy, Restrictive - 6 Studies
- Cardiospasm - 24 Studies
- Cardiotoxicity - 26 Studies
- Cardiovascular Infections - 25 Studies
- Carney Complex - 4 Studies
- Carnitine Palmitoyltransferase 2 Deficiency - 6 Studies
- Caroli Disease - 2 Studies
- Carotid Artery Diseases - 25 Studies
- Carotid Artery Injuries - 4 Studies
- Carotid Artery, Internal, Dissection - 3 Studies
- Carotid Body Tumor - 25 Studies
- Carotid Stenosis - 27 Studies
- Carpal Tunnel Syndrome - 33 Studies
- Cartilage Diseases - 25 Studies
- Cartilage-hair Hypoplasia - 2 Studies
- Castleman Disease - 21 Studies
- Cat-Scratch Disease - 2 Studies
- Cataplexy - 25 Studies
- Cataract - 41 Studies
- Catatonia - 9 Studies
- Catecholaminergic Polymorphic Ventricular Tachycardia - 4 Studies
- Catheter-Related Infections - 25 Studies
- Cauda Equina Syndrome - 2 Studies
- Causalgia - 13 Studies
- CD4 Deficiency - 2 Studies
- Cecal Diseases - 25 Studies
- Celiac Disease - 33 Studies
- Cell Transformation, Neoplastic - 25 Studies
- Cellulitis - 25 Studies
- Central Centrifugal Cicatricial Alopecia - 3 Studies
- Central Cord Syndrome - 6 Studies
- Central Core Disease - 2 Studies
- Central Diabetes Insipidus - 4 Studies
- Central Nervous System Bacterial Infections - 25 Studies
- Central Nervous System Fungal Infections - 24 Studies
- Central Nervous System Germinoma - 19 Studies
- Central Nervous System Infections - 25 Studies
- Central Nervous System Vascular Malformations - 17 Studies
- Central Serous Chorioretinopathy - 25 Studies
- Centronuclear Myopathy - 8 Studies
- Cerebellar Astrocytoma, Childhood - 25 Studies
- Cerebellar Ataxia - 26 Studies
- Cerebellar Diseases - 25 Studies
- Cerebellar Neoplasms - 2 Studies
- Cerebral Amyloid Angiopathy - 8 Studies
- Cerebral Amyloid Angiopathy, Familial - 7 Studies
- Cerebral Arterial Diseases - 25 Studies
- Cerebral Astrocytoma, Childhood - 25 Studies
- Cerebral Hemorrhage - 26 Studies
- Cerebral Infarction - 25 Studies
- Cerebral Palsy - 70 Studies
- Cerebral Palsy Athetoid - 2 Studies
- Cerebral Palsy Spastic Hemiplegic - 4 Studies
- Cerebral Small Vessel Diseases - 26 Studies
- Cerebrospinal Fluid Leak - 23 Studies
- Cerebrospinal Fluid Rhinorrhea - 11 Studies
- Cerebrotendinous Xanthomatosis - 5 Studies
- Cerebrovascular Trauma - 9 Studies
- Ceroid Storage Disease - 21 Studies
- Cervical Dystonia - 25 Studies
- Cervical Intraepithelial Neoplasia - 27 Studies
- Chagas Cardiomyopathy - 13 Studies
- Chagas Disease - 25 Studies
- Chalazion - 7 Studies
- Chanarin-Dorfman Syndrome - 7 Studies
- Chandler's Syndrome - 8 Studies
- Channelopathies - 9 Studies
- Charcot-Marie-Tooth Disease - 26 Studies
- Charcot-Marie-Tooth Disease Type 1 - 10 Studies
- Charcot-Marie-Tooth Disease Type 1A - 12 Studies
- Charcot-Marie-Tooth Disease Type 1B - 2 Studies
- Chediak-Higashi Syndrome - 13 Studies
- Cheilitis - 5 Studies
- Chemotherapy-Induced Febrile Neutropenia - 9 Studies
- Cherubism - 2 Studies
- Chest Pain - 28 Studies
- Cheyne-Stokes Respiration - 25 Studies
- Chiari Malformation Type 2 - 25 Studies
- Chickenpox - 25 Studies
- Chikungunya - 21 Studies
- Chikungunya Fever - 21 Studies
- Child Behavior Disorders - 18 Studies
- Child Development Disorders, Pervasive - 25 Studies
- Child Nutrition Disorders - 26 Studies
- CHILD Syndrome - 5 Studies
- Childhood Acute Lymphoblastic Leukemia - 25 Studies
- Childhood Brain Stem Glioma - 25 Studies
- Childhood Disintegrative Disorder - 2 Studies
- Childhood Hepatocellular Carcinoma - 12 Studies
- Childhood-Onset Schizophrenia - 7 Studies
- Chlamydia Infections - 25 Studies
- Cholangiocarcinoma - 27 Studies
- Cholangitis - 26 Studies
- Cholangitis, Sclerosing - 25 Studies
- Cholecystitis - 27 Studies
- Cholecystitis, Acute - 26 Studies
- Cholecystolithiasis - 25 Studies
- Choledochal Cyst - 4 Studies
- Choledocholithiasis - 27 Studies
- Cholelithiasis - 26 Studies
- Cholera - 26 Studies
- Cholestasis - 25 Studies
- Cholestasis, Extrahepatic - 5 Studies
- Cholestasis, Intrahepatic - 25 Studies
- Cholesteatoma - 7 Studies
- Cholesterol Ester Storage Disease - 25 Studies
- Cholesteryl Ester Storage Disease - 25 Studies
- Choline Deficiency - 3 Studies
- Chondrocalcinosis - 7 Studies
- Chondroma - 2 Studies
- Chondromalacia Patellae - 4 Studies
- Chondrosarcoma - 25 Studies
- Chondrosarcoma, Mesenchymal - 3 Studies
- Chordoma - 25 Studies
- Chorea - 25 Studies
- Chorioamnionitis - 25 Studies
- Choriocarcinoma - 25 Studies
- Chorioretinitis - 7 Studies
- Choristoma - 3 Studies
- Choroid Diseases - 25 Studies
- Choroid Neoplasms - 5 Studies
- Choroid Plexus Carcinoma - 5 Studies
- Choroid Plexus Neoplasms - 25 Studies
- Choroidal Neovascularization - 25 Studies
- Choroideremia - 14 Studies
- Choroiditis - 25 Studies
- Chromophil Renal Cell Carcinoma - 25 Studies
- Chromophobe Renal Cell Carcinoma - 4 Studies
- Chromosomal Instability - 3 Studies
- Chromosomal Triplication - 25 Studies
- Chromosome 17p Deletion - 14 Studies
- Chromosome 22q Deletion - 2 Studies
- Chromosome 5q Deletion - 10 Studies
- Chromosome Aberrations - 25 Studies
- Chromosome Deletion - 16 Studies
- Chromosome Disorders - 25 Studies
- Chromosome Duplication - 25 Studies
- Chronic Active Epstein-Barr Virus Infection - 3 Studies
- Chronic Graft Versus Host Disease - 29 Studies
- Chronic Granulomatous Disease - 27 Studies
- Chronic Infantile Neurological Cutaneous Articular Syndrome - 8 Studies
- Chronic Inflammatory Demyelinating Polyneuropathy - 25 Studies
- Chronic Intestinal Pseudoobstruction - 2 Studies
- Chronic Myelomonocytic Leukemia - 27 Studies
- Chronic Neutrophilic Leukemia - 25 Studies
- Chronic Periodontitis - 28 Studies
- Chronic Thromboembolic Pulmonary Hypertension - 27 Studies
- Chronobiology Disorders - 25 Studies
- Churg-Strauss Syndrome - 25 Studies
- Chylothorax - 7 Studies
- Cicatricial Pemphigoid - 7 Studies
- Cicatrix - 25 Studies
- Cicatrix, Hypertrophic - 25 Studies
- Ciliary Motility Disorders - 23 Studies
- Citrullinemia - 8 Studies
- Citrullinemia Type I - 8 Studies
- Clear Cell Renal Cell Carcinoma - 28 Studies
- Cleft Lip - 25 Studies
- Cleft Palate - 25 Studies
- Clostridium Infections - 25 Studies
- Clubfoot - 26 Studies
- Cluster Headache - 26 Studies
- Coagulation Protein Disorders - 25 Studies
- Coal Worker's Pneumoconiosis - 24 Studies
- Coats Disease - 2 Studies
- Cocaine-Related Disorders - 25 Studies
- Coccidioidomycosis - 25 Studies
- Coccidiosis - 25 Studies
- Coccygodynia - 2 Studies
- Cockayne Syndrome - 5 Studies
- Coenzyme Q10 Deficiency - 2 Studies
- Cogan Syndrome - 7 Studies
- Coinfection - 25 Studies
- Cold Agglutinin Disease - 6 Studies
- Cold Urticaria - 10 Studies
- Colic - 25 Studies
- Colitis - 25 Studies
- Colitis, Collagenous - 1 Studies
- Colitis, Ischemic - 2 Studies
- Colitis, Lymphocytic - 6 Studies
- Colitis, Microscopic - 17 Studies
- Colitis, Ulcerative - 25 Studies
- Collecting Duct Carcinoma - 5 Studies
- Colles' Fracture - 23 Studies
- Coloboma - 5 Studies
- Coloboma of Optic Nerve - 2 Studies
- Colonic Diseases, Functional - 25 Studies
- Colonic Neoplasms - 32 Studies
- Colonic Polyps - 25 Studies
- Color Vision Defects - 10 Studies
- Colorectal Neoplasms, Hereditary Nonpolyposis - 25 Studies
- Coma - 26 Studies
- Combat Disorders - 25 Studies
- Common Bile Duct Diseases - 25 Studies
- Common Bile Duct Neoplasms - 2 Studies
- Common Cold - 25 Studies
- Common Variable Immunodeficiency - 36 Studies
- Communicable Diseases, Emerging - 4 Studies
- Communication Disorders - 25 Studies
- Community-Acquired Infections - 25 Studies
- Compartment Syndromes - 27 Studies
- Compassion Fatigue - 5 Studies
- Complete Atrioventricular Canal - 3 Studies
- Complex Regional Pain Syndromes - 29 Studies
- Composite Lymphoma - 2 Studies
- Compulsive Behavior - 25 Studies
- Compulsive Personality Disorder - 25 Studies
- Conduct Disorder - 25 Studies
- Condylomata Acuminata - 25 Studies
- Cone Dystrophy - 5 Studies
- Cone-rod Dystrophy - 24 Studies
- Cone-rod Dystrophy 2 - 24 Studies
- Confusion - 25 Studies
- Congenital Adrenal Hyperplasia - 27 Studies
- Congenital Amegakaryocytic Thrombocytopenia - 6 Studies
- Congenital Aplastic Anemia - 25 Studies
- Congenital Central Hypoventilation Syndrome - 7 Studies
- Congenital Cytomegalovirus - 25 Studies
- Congenital Diaphragmatic Hernia - 26 Studies
- Congenital Disorders of Glycosylation - 3 Studies
- Congenital Dyserythropoietic Anemia - 3 Studies
- Congenital Dyserythropoietic Anemia Type 1 - 2 Studies
- Congenital Erythropoietic Porphyria - 25 Studies
- Congenital Fiber Type Disproportion - 2 Studies
- Congenital Heart Block - 6 Studies
- Congenital Hemolytic Anemia - 4 Studies
- Congenital Hepatic Fibrosis - 4 Studies
- Congenital Herpes Simplex - 5 Studies
- Congenital Hyperinsulinism - 19 Studies
- Congenital Hypothyroidism - 11 Studies
- Congenital Lymphedema - 7 Studies
- Congenital Mesoblastic Nephroma - 7 Studies
- Congenital Microtia - 3 Studies
- Congenital Mirror Movement Disorder - 2 Studies
- Congenital Muscular Dystrophy - 8 Studies
- Congenital Muscular Dystrophy Due to Dystroglycanopathy - 3 Studies
- Congenital Myasthenic Syndrome - 11 Studies
- Congenital Myotonic Dystrophy - 3 Studies
- Congenital Pseudoarthrosis - 3 Studies
- Congenital Sucrase-isomaltase Deficiency - 2 Studies
- Congenital Sucrose Isomaltose Malabsorption - 2 Studies
- Congenital Torticollis - 7 Studies
- Conjunctival Diseases - 25 Studies
- Conjunctival Neoplasms - 4 Studies
- Conjunctivitis - 25 Studies
- Conjunctivitis, Allergic - 25 Studies
- Conjunctivitis, Bacterial - 23 Studies
- Conjunctivitis, Inclusion - 11 Studies
- Conjunctivitis, Viral - 13 Studies
- Conotruncal Heart Malformations - 3 Studies
- Consciousness Disorders - 25 Studies
- Constipation - 31 Studies
- Contracture - 25 Studies
- Contusions - 25 Studies
- Convalescence - 12 Studies
- Conversion Disorder - 25 Studies
- Coproporphyria, Hereditary - 4 Studies
- Corneal Diseases - 25 Studies
- Corneal Dystrophies, Hereditary - 25 Studies
- Corneal Edema - 24 Studies
- Corneal Endothelial Cell Loss - 13 Studies
- Corneal Injuries - 11 Studies
- Corneal Neovascularization - 20 Studies
- Corneal Opacity - 23 Studies
- Corneal Perforation - 2 Studies
- Corneal Ulcer - 26 Studies
- Cornelia De Lange Syndrome - 3 Studies
- Coronary Aneurysm - 8 Studies
- Coronary Artery Aneurysm - 8 Studies
- Coronary Occlusion - 26 Studies
- Coronary Restenosis - 25 Studies
- Coronary Stenosis - 27 Studies
- Coronary Thrombosis - 15 Studies
- Coronary Vasospasm - 25 Studies
- Coronary Vessel Anomalies - 6 Studies
- Coronavirus Infections - 23 Studies
- Corpus Callosum Agenesis - 9 Studies
- Corticobasal Degeneration - 18 Studies
- Corynebacterium Infections - 25 Studies
- Cough - 27 Studies
- Cowden Syndrome - 5 Studies
- Coxsackievirus Infections - 25 Studies
- Cranial Nerve Diseases - 25 Studies
- Craniofacial Abnormalities - 25 Studies
- Craniofacial Dysostosis - 19 Studies
- Craniofacial Microsomia - 5 Studies
- Craniomandibular Disorders - 25 Studies
- Craniopharyngioma - 25 Studies
- Craniosynostoses - 25 Studies
- CREST Syndrome - 3 Studies
- Creutzfeldt-Jakob Disease - 6 Studies
- Creutzfeldt-Jakob Syndrome - 5 Studies
- Crigler Najjar Syndrome, Type 1 - 8 Studies
- Crigler Najjar Syndrome, Type 2 - 3 Studies
- Crigler-Najjar Syndrome - 8 Studies
- Crohn Disease - 42 Studies
- Cross Infection - 25 Studies
- Croup - 10 Studies
- Crouzon Syndrome - 24 Studies
- Cryoglobulinemia - 10 Studies
- Cryopyrin-Associated Periodic Syndromes - 19 Studies
- Cryptococcosis - 25 Studies
- Cryptorchidism - 17 Studies
- Cryptosporidiosis - 23 Studies
- Cubital Tunnel Syndrome - 13 Studies
- Cumulative Trauma Disorders - 25 Studies
- Cushing Syndrome - 27 Studies
- Cutaneous Fistula - 2 Studies
- Cutaneous Lupus Erythematosus - 25 Studies
- Cutaneous Mastocytosis - 7 Studies
- Cutaneous Sclerosis - 2 Studies
- Cutaneous T-cell Lymphoma - 26 Studies
- Cutis Laxa - 25 Studies
- Cyanosis - 4 Studies
- Cyclic Vomiting Syndrome - 9 Studies
- Cyclothymic Disorder - 4 Studies
- Cylindroma - 25 Studies
- Cystadenocarcinoma - 25 Studies
- Cystadenocarcinoma, Mucinous - 25 Studies
- Cystadenocarcinoma, Serous - 24 Studies
- Cystadenoma - 7 Studies
- Cystadenoma, Mucinous - 3 Studies
- Cystadenoma, Serous - 2 Studies
- Cystic Adenomatoid Malformation of Lung - 3 Studies
- Cystic Adenomatoid Malformation of Lung, Congenital - 3 Studies
- Cystic Fibrosis - 56 Studies
- Cysticercosis - 19 Studies
- Cystinosis - 24 Studies
- Cystinuria - 13 Studies
- Cystitis - 25 Studies
- Cystitis, Interstitial - 25 Studies
- Cystocele - 25 Studies
- Cysts - 25 Studies
- Cytomegalic Inclusion Disease - 25 Studies
- Cytomegalovirus Infections - 27 Studies
- Cytomegalovirus Retinitis - 25 Studies