See Conditions by First Letter (C)
- Cachexia
- CADASIL
- Cadaver
- Calcinosis
- Calciphylaxis
- Calcium Metabolism Disorders
- Calculi
- Callosities
- Campylobacter Infections
- Camurati-Engelmann Disease
- Canavan Disease
- Candidemia
- Candidiasis
- Candidiasis, Chronic Mucocutaneous
- Candidiasis, Cutaneous
- Candidiasis, Invasive
- Candidiasis, Oral
- Candidiasis, Vulvovaginal
- Capillary Hemangioblastoma
- Capillary Leak Syndrome
- Capsule Opacification
- Carbamoyl Phosphate Synthetase 1 Deficiency
- Carbamoyl-Phosphate Synthase I Deficiency Disease
- Carbon Monoxide Poisoning
- Carbuncle
- Carcinoid Syndrome
- Carcinoid Tumor
- Carcinoma
- Carcinoma in Situ
- Carcinoma, Acinar Cell
- Carcinoma, Adenoid Cystic
- Carcinoma, Adenosquamous
- Carcinoma, Basal Cell
- Carcinoma, Basosquamous
- Carcinoma, Bronchogenic
- Carcinoma, Ductal
- Carcinoma, Ductal, Breast
- Carcinoma, Embryonal
- Carcinoma, Endometrioid
- Carcinoma, Giant Cell
- Carcinoma, Hepatocellular
- Carcinoma, Intraductal, Noninfiltrating
- Carcinoma, Islet Cell
- Carcinoma, Large Cell
- Carcinoma, Lobular
- Carcinoma, Medullary
- Carcinoma, Merkel Cell
- Carcinoma, Mucoepidermoid
- Carcinoma, Neuroendocrine
- Carcinoma, Non-Small-Cell Lung
- Carcinoma, Pancreatic Ductal
- Carcinoma, Papillary
- Carcinoma, Renal Cell
- Carcinoma, Signet Ring Cell
- Carcinoma, Small Cell
- Carcinoma, Squamous Cell
- Carcinoma, Transitional Cell
- Carcinoma, Verrucous
- Carcinosarcoma
- Cardiac Complexes, Premature
- Cardiac Output, High
- Cardiac Output, Low
- Cardiac Tamponade
- Cardiomegaly
- Cardiomyopathies
- Cardiomyopathy, Alcoholic
- Cardiomyopathy, Dilated
- Cardiomyopathy, Hypertrophic
- Cardiomyopathy, Hypertrophic, Familial
- Cardiomyopathy, Restrictive
- Cardiospasm
- Cardiovascular Abnormalities
- Cardiovascular Infections
- Carney Complex
- Carnitine Palmitoyltransferase 2 Deficiency
- Caroli Disease
- Carotid Artery Diseases
- Carotid Artery Injuries
- Carotid Stenosis
- Carpal Tunnel Syndrome
- Cartilage Diseases
- Castleman's Disease
- Cat-Scratch Disease
- Cataplexy
- Cataract
- Catastrophic Antiphospholipid Syndrome
- Catatonia
- Catheter-Related Infections
- Causalgia
- Celiac Disease
- Cell Transformation, Neoplastic
- Cellulitis
- Central Centrifugal Cicatricial Alopecia
- Central Cord Syndrome
- Central Core Disease
- Central Nervous System Diseases
- Central Nervous System Fungal Infections
- Central Nervous System Infections
- Central Nervous System Lymphoma, Primary
- Central Nervous System Neoplasms
- Central Nervous System Vascular Malformations
- Central Nervous System Viral Diseases
- Central Post-stroke Pain
- Central Serous Chorioretinopathy
- Cephalopelvic Disproportion
- Cerebellar Astrocytoma, Childhood
- Cerebellar Ataxia
- Cerebellar Degeneration
- Cerebellar Diseases
- Cerebellar Neoplasms
- Cerebral Amyloid Angiopathy
- Cerebral Arterial Diseases
- Cerebral Astrocytoma, Childhood
- Cerebral Cavernous Malformation
- Cerebral Hemorrhage
- Cerebral Hemorrhage, Traumatic
- Cerebral Infarction
- Cerebral Palsy
- Cerebral Palsy Spastic Diplegic
- Cerebral Palsy Spastic Hemiplegic
- Cerebrospinal Fluid Leak
- Cerebrospinal Fluid Rhinorrhea
- Cerebrotendinous Xanthomatosis
- Cerebrovascular Disorders
- Cerebrovascular Trauma
- Ceroid Storage Disease
- Cervical Dystonia
- Cervical Intraepithelial Neoplasia
- Chagas Cardiomyopathy
- Chagas Disease
- Chalazion
- Chanarin-Dorfman Syndrome
- Chancre
- Chandler's Syndrome
- Channelopathies
- Charcot-Marie-Tooth Disease
- Charcot-Marie-Tooth Disease Type 1A
- Chediak-Higashi Syndrome
- Cheilitis
- Cherubism
- Chest Pain
- Cheyne-Stokes Respiration
- Chiari Malformation Type 2
- Chickenpox
- Chikungunya
- Child Behavior Disorders
- Child Development Disorders, Pervasive
- Child Nutrition Disorders
- CHILD Syndrome
- Childhood Disintegrative Disorder
- Childhood-Onset Schizophrenia
- Chills
- Chlamydia Infections
- Cholangiocarcinoma
- Cholangitis
- Cholangitis, Sclerosing
- Cholecystitis
- Cholecystitis, Acute
- Cholecystolithiasis
- Choledocholithiasis
- Cholelithiasis
- Cholera
- Cholestasis
- Cholestasis, Extrahepatic
- Cholestasis, Intrahepatic
- Cholestasis, Progressive Familial Intrahepatic 3
- Cholesteatoma
- Cholesterol Ester Storage Disease
- Choline Deficiency
- Chondrocalcinosis
- Chondrocalcinosis 2
- Chondrodysplasia Punctata
- Chondromalacia Patellae
- Chondrosarcoma
- Chordoma
- Chorea
- Chorea Minor
- Choreoacanthocytosis
- Chorioamnionitis
- Choriocarcinoma
- Chorioretinitis
- Choristoma
- Choroid Diseases
- Choroid Neoplasms
- Choroid Plexus Carcinoma
- Choroid Plexus Neoplasms
- Choroidal Neovascularization
- Choroideremia
- Choroiditis
- Chromophil Renal Cell Carcinoma
- Chromosomal Instability
- Chromosomal Triplication
- Chromosome 17p Deletion
- Chromosome 5q Deletion
- Chromosome Aberrations
- Chromosome Deletion
- Chromosome Disorders
- Chronic Active Epstein-Barr Virus Infection
- Chronic Berylliosis
- Chronic Disease
- Chronic Graft Versus Host Disease
- Chronic Granulomatous Disease
- Chronic Infantile Neurological Cutaneous Articular Syndrome
- Chronic Inflammatory Demyelinating Polyneuropathy
- Chronic Lymphocytic Leukemia
- Chronic Myeloid Leukemia
- Chronic Myelomonocytic Leukemia
- Chronic Myeloproliferative Disorders
- Chronic Neutrophilic Leukemia
- Chronic Periodontitis
- Chronobiology Disorders
- Churg-Strauss Syndrome
- Chylothorax
- Chylothorax, Congenital
- Cicatricial Pemphigoid
- Cicatrix
- Cicatrix, Hypertrophic
- Ciliary Motility Disorders
- Citrullinemia
- Citrullinemia Type I
- Classic Kaposi Sarcoma
- Clear Cell Renal Cell Carcinoma
- Cleft Lip
- Cleft Palate
- CLIPPERS
- Clostridium Difficile
- Clostridium Infections
- Clostridium Sordellii
- Clubfoot
- Cluster Headache
- COACH Syndrome
- Coagulation Protein Disorders
- Coal Worker's Pneumoconiosis
- Coats Disease
- Cocaine-Related Disorders
- Coccidioidomycosis
- Coccidiosis
- Cockayne Syndrome
- Cogan Syndrome
- Cognition Disorders
- Cold Agglutinin Disease
- Cold Contact Urticaria
- Colic
- Colitis
- Colitis, Collagenous
- Colitis, Ischemic
- Colitis, Lymphocytic
- Colitis, Microscopic
- Colitis, Ulcerative
- Collagen Diseases
- Collagenous Colitis
- Collecting Duct Carcinoma
- Colles' Fracture
- Coloboma
- Colonic Diseases
- Colonic Diseases, Functional
- Colonic Neoplasms
- Colonic Polyps
- Color Vision Defects
- Colorectal Neoplasms
- Colorectal Neoplasms, Hereditary Nonpolyposis
- Coma
- Combat Disorders
- Combined Malonic and Methylmalonic Aciduria
- Common Bile Duct Diseases
- Common Bile Duct Neoplasms
- Common Cold
- Common Variable Immunodeficiency
- Communicable Diseases, Emerging
- Communication Disorders
- Community-Acquired Infections
- Compartment Syndromes
- Complete Atrioventricular Canal
- Complex Regional Pain Syndromes
- Compulsive Behavior
- Conduct Disorder
- Condylomata Acuminata
- Cone-rod Dystrophy
- Cone-rod Dystrophy 2
- Confusion
- Congenital Abnormalities
- Congenital Adrenal Hyperplasia
- Congenital Amegakaryocytic Thrombocytopenia
- Congenital Antithrombin Deficiency
- Congenital Aplastic Anemia
- Congenital Central Hypoventilation Syndrome
- Congenital Cytomegalovirus
- Congenital Diaphragmatic Hernia
- Congenital Dyserythropoietic Anemia
- Congenital Dyserythropoietic Anemia Type 1
- Congenital Fiber Type Disproportion
- Congenital Heart Block
- Congenital Hemolytic Anemia
- Congenital Hepatic Fibrosis
- Congenital Herpes Simplex
- Congenital Hypothyroidism
- Congenital Muscular Dystrophy
- Congenital Muscular Dystrophy Type 1A
- Congenital Porphyria
- Congenital Torticollis
- Conjunctival Diseases
- Conjunctival Neoplasms
- Conjunctivitis
- Conjunctivitis, Allergic
- Conjunctivitis, Bacterial
- Conjunctivitis, Inclusion
- Conjunctivitis, Viral
- Conn's Syndrome
- Connective Tissue Diseases
- Conotruncal Heart Malformations
- Consciousness Disorders
- Constipation
- Constriction, Pathologic
- Contracture
- Contusions
- Convalescence
- Conversion Disorder
- Coproporphyria, Hereditary
- Corneal Diseases
- Corneal Dystrophies, Hereditary
- Corneal Edema
- Corneal Endothelial Cell Loss
- Corneal Neovascularization
- Corneal Opacity
- Corneal Ulcer
- Corneal Wavefront Aberration
- Coronary Aneurysm
- Coronary Artery Aneurysm
- Coronary Artery Disease
- Coronary Disease
- Coronary Occlusion
- Coronary Restenosis
- Coronary Stenosis
- Coronary Thrombosis
- Coronary Vasospasm
- Coronary Vessel Anomalies
- Corticobasal Degeneration
- Cough
- Cowden Syndrome
- Coxsackievirus Infections
- Craniocerebral Trauma
- Craniofacial Abnormalities
- Craniofacial Dysostosis
- Craniofacial Dystonia
- Craniofrontonasal Dysplasia
- Craniomandibular Disorders
- Craniopharyngioma
- Craniosynostoses
- CREST Syndrome
- Creutzfeldt-Jakob Disease
- Creutzfeldt-Jakob Syndrome
- Crigler-Najjar Syndrome
- Critical Illness
- Crohn Disease
- Cross Infection
- Croup
- Crouzon Syndrome
- Cryoglobulinemia
- Cryopyrin-Associated Periodic Syndromes
- Cryptococcosis
- Cryptogenic Organizing Pneumonia
- Cryptorchidism
- Cryptosporidiosis
- Cubital Tunnel Syndrome
- Cumulative Trauma Disorders
- Currarino Triad
- Cushing Syndrome
- Cutaneous Fistula
- Cutaneous Lupus Erythematosus
- Cutaneous Mastocytosis
- Cutaneous Sclerosis
- Cutaneous T-cell Lymphoma
- Cutis Laxa
- Cyanosis
- Cyclic Vomiting Syndrome
- Cyclothymic Disorder
- Cystadenocarcinoma
- Cystadenocarcinoma, Mucinous
- Cystadenocarcinoma, Serous
- Cystadenoma
- Cystadenoma, Mucinous
- Cystic Adenomatoid Malformation of Lung
- Cystic Adenomatoid Malformation of Lung, Congenital
- Cystic Fibrosis
- Cystic Hygroma
- Cysticercosis
- Cystinosis
- Cystinuria
- Cystitis
- Cystitis, Interstitial
- Cystocele
- Cystosarcoma Phyllodes
- Cysts
- Cytomegalic Inclusion Disease
- Cytomegalovirus Infections
- Cytomegalovirus Retinitis