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Disease

Central nervous system vascular malformations

Several types of this condition affect the blood vessels in the brain or spinal cord.
Disease

Central sleep apnea

Find out how a mix-up in brain signals can affect your breathing during sleep, and learn how this sleep disorder can be treated.
Disease

Cervical spondylosis

As people age, the spinal disks in the neck shrink and bone spurs often develop. If symptoms occur, nonsurgical treatments are usually effective.
Disease

Childhood apraxia of speech

This speech disorder is caused by a problem with communication between the brain and the muscles used for speech. Speech therapy can help.
Disease

Childhood schizophrenia

This severe mental disorder in children involves hallucinations, delusions, and disordered thinking and behavior that can impair the ability to function.
Disease

Chronic exertional compartment syndrome

Learn about this condition that causes pain and swelling in muscles of the legs or arms during exercise.
Disease

Chronic sinusitis

Read about possible causes of lasting sinus troubles, treatments and how to prevent these problems.
Disease

Churg-Strauss syndrome

Eosinophilic granulomatosis with polyangiitis is a rare blood vessel disease that may cause breathing trouble, face pain and a runny nose. Medicines can help.
Disease

Cold sore

Learn more about the causes, symptoms, treatment and prevention of this common lip sore caused by the herpes simplex virus type 1 (HSV-1).
Disease

Complex regional pain syndrome

Learn about this neurological condition that may affect an arm or a leg after an injury or surgery. Early treatment may prevent a recurrence.
Disease

Compulsive sexual behavior

Also called sexual addiction, this means being obsessed with sexual fantasies, urges, or behaviors that disrupt your life or cause harm to you or others.
Disease

Congenital myasthenic syndromes

These rare hereditary conditions result in a problem in nerve stimulation, causing muscle weakness that worsens with physical activity.

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