C

Carbon monoxide poisoning

Carcinoid syndrome

Cardiogenic shock

Carotid artery disease

Carpal tunnel syndrome

Castleman disease, multicentric

Castleman disease, unicentric

Catatonic schizophrenia

Cavities or tooth decay

Central sleep apnea

Cervical cancer

Cervical dystonia

Cervical spondylosis

Chagas disease, acute

Chagas disease, chronic

Charcot Marie Tooth disease

Chiari malformation

Child intussusception

Childhood disintegrative disorder

Childhood schizophrenia

Cholestasis of pregnancy

Chondromalacia patella

Chronic actinic dermatitis

Chronic coccidioidomycosis

Chronic exertional compartment syndrome

Chronic fatigue syndrome

Chronic hives (urticaria)

Chronic intestinal ischemia

Chronic kidney failure

Chronic lymphocytic leukemia

Chronic myelogenous leukemia

Chronic obstructive pulmonary disease (COPD)

Chronic pelvic pain

Chronic pulmonary edema

Chronic sinusitis

Churg Strauss syndrome

Cleft lip and cleft palate

Cluster headache

Coarctation of the aorta

Collagenous colitis, lymphocytic colitis

Collapsed lung (pneumothorax)

Complex regional pain syndrome

Complicated grief

Compulsive gambling

Compulsive sexual behavior

Congenital adrenal hyperplasia

Congenital heart defects in children

Congenital heart disease in adults

Congenital syphilis

Contact dermatitis

Convergence insufficiency

Conversion disorder

Corns and calluses

Coronary artery disease

Costochondritis

Cough headaches

Coxsackievirus infections

Craniosynostosis

Creutzfeldt Jakob disease

Crohn's disease

Cryptosporidium infection

Cushing's syndrome

Cutaneous anthrax

Cutaneous porphyrias

Cyclic vomiting syndrome

Cyclospora infection

Cystic fibrosis