In-depth

Symptoms

Headache

Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Tests and diagnosis

CT scan

A CT scan is an imaging test that uses X-rays to produce detailed images of the inside of your body.

Lumbar puncture (spinal tap)

Lumbar puncture (spinal tap) — Overview covers definition, risks and results of this procedure.

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

May. 05, 2012

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