In-depth

Causes

Sleep apnea

Sleep apnea causes people to repeatedly stop breathing during their sleep. Common signs of this sleep disorder include loud snores punctuated by periods of silence.

Risk factors

Cardiomyopathy

High blood pressure (hypertension)

Symptoms

Enlarged spleen

An enlarged spleen is usually a sign of an underlying problem. Treatment varies, depending on what's causing the enlargement.

Tests and diagnosis

Amniocentesis

Amniocentesis — Overview covers definition, risks, results of this prenatal test.

Chest X-rays

Chorionic villus sampling

Chorionic villus sampling — Overview covers definition, risks, results of this early prenatal test.

Treatments and drugs

Gene therapy

Gene therapy is an experimental treatment that involves altering genes in a person's cells to stop disease.

Stem cell transplant

Tonsillectomy

Dec. 13, 2012