Colon Cancer Chronic Obstructive Pulmonary Disease Cardiac Stress Testing Colon Polyps Cataracts Corneal Abrasion Campylobacteriosis Canker sore Congestive Heart Failure Carbon monoxide poisoning Candidiasis Campylobacter Coccidioidomycosis Carbuncle Carsickness Child Neglect and Abuse Cystic Fibrosis Calories Calcium Chromium Copper Cholesterol Disorders Chronic Granulomatous Disease Chronic Mucocutaneous Candidiasis Common Variable Immunodeficiency Chromosomal and Genetic Abnormalities: Introduction Contraception and Adolescent Pregnancy Central Nervous System Infections Chickenpox Croup Constipation Chronic and Recurring Abdominal Pain Chondromalacia Patellae Cutis Laxa Carbohydrate Metabolism Cancer in Childhood Cerebral Palsy (CP) Childhood Disintegrative Disorder Childhood Schizophrenia Conduct Disorder Children: Social Issues Childcare Cat-scratch disease (CSD) Cannabis Cataracts Cerebral aneurism Cleft lip and palate Coeliac disease Collapsed lung Conjoined twins COPD (Chronic Obstructive Pulmonary Disease) Crohn's disease Cystic fibrosis Carnitine Deficiency Syndrome C Syndrome Campomelic Syndrome Camurati-Engelmann Disease Canavan Disease Cancer, Colon Cancer, Prostate Cancers, Skin, General Candidiasis Carbamyl Phosphate Synthetase Deficiency Carcinoid Syndrome Carcinoma, Renal Cell Carcinoma, Squamous Cell Cardiofaciocutaneous Syndrome Carnitine Deficiency Syndrome Carnitine Palmitoyltransferase 1A Deficiency Carnosinemia Caroli Disease Carpal Tunnel Syndrome Carpenter Syndrome Castleman's Disease Cat Eye Syndrome Cat Scratch Disease Cataract Dental Syndrome Cataracts Catel Manzke Syndrome Caudal Regression Syndrome Cavernous Malformation Cayler Syndrome Celiac Disease Central Core Disease Central Diabetes Insipidus Central Hypoventilation Syndrome, Congenital Cerebellar Agenesis Cerebellar Degeneration, Subacute Cerebral Palsy Cerebro Oculo Facio Skeletal Syndrome Cerebrocostomandibular Syndrome Cerebrotendinous Xanthomatosus Cervical Teratoma Chagas Disease Chalazion Chandler's Syndrome Charcot Marie Tooth Disease CHARGE Syndrome Chediak Higashi Syndrome Chiari Frommel Syndrome Chikungunya Chlamydia Cholecystitis Cholera Cholestasis Cholesteryl Ester Storage Disease Chondrocalcinosis, Familial Articular Chordoma Chorea, Sydenham's Choroideremia Choroiditis, Serpiginous Chromosome 10, Distal Trisomy 10q Chromosome 10, Monosomy 10p Chromosome 11, Partial Monosomy 11q Chromosome 11, Partial Trisomy 11q Chromosome 13, Partial Monosomy 13q Chromosome 14 Ring Chromosome 14, Trisomy Mosaic Chromosome 15 Ring Chromosome 15, Distal Trisomy 15q Chromosome 18 Ring Chromosome 18, Monosomy 18p Chromosome 18, Tetrasomy 18p Chromosome 18q- Syndrome Chromosome 21 Ring Chromosome 22 Ring Chromosome 22, Trisomy Mosaic Chromosome 3, Monosomy 3p Chromosome 3, Trisomy 3q2 Chromosome 4 Ring Chromosome 4, Monosomy 4q Chromosome 4, Monosomy Distal 4q Chromosome 4, Partial Trisomy Distal 4q Chromosome 4, Trisomy 4p Chromosome 5, Trisomy 5p Chromosome 6 Ring Chromosome 6, Partial Trisomy 6q Chromosome 7, Partial Monosomy 7p Chromosome 8, Monosomy 8p Chromosome 9 Ring Chromosome 9, Partial Monosomy 9p Chromosome 9, Tetrasomy 9p Chromosome 9, Trisomy 9p (Multiple Variants) Chromosome 9, Trisomy Mosaic Chronic Fatigue Syndrome/Myalgic Encephalomyelitis Chronic Fatigue Syndrome Chronic Inflammatory Demyelinating Polyneuropathy Churg Strauss Syndrome Cicatricial alopecia Ciguatera Fish Poisoning Cirrhosis, Primary Biliary Citrullinemia Cleft Palate and Cleft Lip Cleidocranial Dysplasia Clubfoot Coats' Disease Cockayne Syndrome Coffin Lowry Syndrome Coffin Siris Syndrome Cogan Reese Syndrome Cohen Syndrome Colitis, Collagenous Colitis, Ulcerative Collagen Type VI-Related Disorders Colorado Tick Fever Common Variable Immunodeficiency Condyloma Cone Dystrophy Congenital Disorders of Glycosylation Type Ia Congenital Fibrosis of the Extraocular Muscles Congenital Muscular Dystrophy Congenital Pulmonary Lymphangiectasia Congenital Varicella Syndrome Conjunctivitis, Ligneous Conn Syndrome Conradi Hunermann Syndrome Conversion Disorder Cor Triatriatum Corneal Dystrophies Cornelia de Lange Syndrome Corticobasal Degeneration Costello Syndrome Cowpox Craniofrontonasal Dysplasia Craniometaphyseal Dysplasia Craniosynostosis, Primary Creutzfeldt Jakob Disease Cri du Chat Syndrome Crigler Najjar Syndrome Crohn's Disease Cronkhite-Canada Syndrome Crouzon Syndrome Cryoglobulinemia, Essential Mixed Cryptococcosis Cushing's Syndrome Cutaneous T-Cell Lymphomas Cutis Laxa Cutis Marmorata Telangiectatica Congenita Cyclic Vomiting Syndrome Cystic Fibrosis Cystic Hygroma Cysticercosis Cystinosis Cystinuria Cytochrome C Oxidase Deficiency Cytomegalovirus Infection