A Pennsylvania teenager has a rare disorder that results in her sleeping up to 19 hours a day. 

Nicole Delien suffers Kleine-Levin syndrome, sometimes referred to as "Sleeping Beauty Syndrome," and recently slept for 64 straight days. It's not uncommon for Delien to go under sleep spells, which then cause her to wake up in a confused state while sleepwalking. 

Vicki Delien, the mother of the teenager, also said that her daughter sleeps an average of 18 to 19 hours per day and wakes up in a "sleepwalking state which she doesn't remember," according to the Daily Mail.

"She's never really adjusted to it. She's 17 now and it really upsets her," Vicki stated, according to the Chartiers Valley Patch. "She's missed out on a lot." 

This week, the Delien family explained to Jeff Probst on his syndicated talk show that it took 25 months before Nicole was diagnosed with Kleine-Levin syndrome. Doctors initially felt that she had the West Nile virus before ultimately realizing she had the sleep disorder.

The Delien family said medications have helped spread Nicole's long sleeping episodes apart. However, she can sleep anywhere from 32 to 64 days in a row and her longest episode started on Thanksgiving, and she didn't wake up until well after the Christmas holiday.

The Kleine-Levin Syndrome Foundation website stated that "affected individuals may go for a period of weeks, months or even years without experiencing any symptoms, and then they reappear with little warning."

"When awake, the patient's whole demeanor is changed, often appearing 'spacey' or childlike. When awake he experiences confusion, disorientation, complete lack of energy (lethargy), and lack of emotions (apathy)," the site added.

The condition is said to predominantly affect males and the cause is still unknown. Nicole stated that she hasn't experienced a sleeping incident from the disorder since March, but fears the next episode.