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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Trastorno del sueño

Sleep disorder (sleep dis-OR-der)
A disturbance of normal sleep patterns. There are a number of sleep disorders that range from trouble falling asleep, to nightmares, sleepwalking, and sleep apnea (problems with breathing that cause loud snoring). Poor sleep may also be caused by diseases such as heart disease, lung disease, or nerve disorders.



 
 
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.