April 8th, 2010
09:00 AM ET

Can a child recover from autism?

As a feature of CNNhealth.com, our team of expert doctors will answer readers' questions. Here's a question for Dr. Gupta.

From Wendy in Detroit:

"I have a daughter that I was told was autistic when she was younger, but now that she's grown I'm being told she is not and likely never was. I am told her only issue was language processing. I don't know whether to consider her misdiagnosed or recovering autistic.”


Wendy as you might guess, without meeting and assessing your daughter,  it's difficult for anyone to determine whether your daughter was in fact misdiagnosed or not.

But here are some things I can tell you. According to experts that we've spoken with there's no specific cure for autism. So if you were born with it, you'll always have it but it may become very mild almost to the point of becoming undetectable.

If it's diagnosed early – around age 2 – and a child gets therapy early, it's possible, in some cases, for a child's symptoms to improve so much that he or she no longer meets the criteria for autism. Some people call this "recovery" and experts estimate this can happen in maybe 10 percent of children who fall under the entire autism spectrum.

It is possible as well that a child was misdiagnosed as having autism while actually having a different developmental disorder all together. Wendy, I hope that helps you.

April 8th, 2010
12:10 AM ET

Sleep apnea boosts stroke risk

By Val Willingham
CNN Medical Producer

Obstructive sleep apnea, a condition in which breathing stops intermittently during sleep - is associated with an increased risk of stroke in middle-aged or older Americans, especially in men, according to a new study out of the American Journal of Respiratory and Critical Care Medicine. And that's a scary statistic, since, according to the National Sleep Foundation, 18 million people in the U.S. suffer from sleep apnea and many of them don't know it.

Researchers compiled data from the famous Sleep Heart Health Study and looked at stroke risk in 5,422 participants aged 40 years and older without a history of stroke. At the start of the study, participants performed a standard at-home sleep test that determined whether they had sleep apnea and, if so, the severity of the sleep apnea. Participants were followed for an average of nine years. During that period, a total of 193 participants had a stroke – 85 men (of 2,462 men enrolled) and 108 women (out of 2,960 enrolled).

Study investigators found that the increased risk of stroke appeared in men with mild sleep apnea. Their risk of stroke rose if the apnea was more severe. Men with moderate to severe sleep apnea were nearly three times more likely to have a stroke than men without sleep apnea or with mild sleep apnea. But in women it was different. The increased risk of stroke in females was significant only with severe levels of sleep apnea. The increased risk of stroke from sleep apnea depended on other risk factors the women had such as weight issues, smoking, race, diabetes and high blood pressure.

People who have sleep apnea can have one or more pauses in breathing or shallow breaths while they sleep. It can also be accompanied with loud snoring, or snorting. The pauses often occur five to 30 times an hour. Many times the sleeper is disrupted during the night, because of odd breathing habits, which can result in excessive daytime sleepiness. The erratic sleeping/breathing pattern can also put serious stress on the heart, because the pauses cause the flow of oxygen to the vital organs to slow or even stop for a few seconds, which makes the heart pump harder.

"And what's even more alarming, is that the body becomes used to these erratic patterns, even if we are not sleeping," says Michael J. Twery, Ph.D., director of the NIH National Center on Sleep Disorders Research "And when that happens you have stress on the heart all the time. The effects from sleep apnea start to erode your health and that can eventually lead to stroke."

Researchers believed that because men are more prone to have sleep apnea earlier in life, the risks of stroke are much higher than in women, who usually suffer from sleep apnea when they are pregnant, overweight or are already going through menopause.

"It’s possible that the stroke risk is related to cumulative effects of sleep apnea adversely influencing health over many years,” said Susan Redline, M.D., MPH.

"Our findings provide compelling evidence that obstructive sleep apnea is a risk factor for stroke, especially in men," said Susan Redline, M.D., M.P.H., professor of medicine, pediatrics, and epidemiology and biostatistics, at Case Western Reserve University in Cleveland, Ohio, and lead author of the paper. "Overall, the increased risk of stroke in men with sleep apnea is comparable to adding 10 years to a man's age. Importantly, we found that increased stroke risk in men occurs even with relatively mild levels of sleep apnea.”

Because sleep apnea symptoms happen at night, when the patient is asleep, many don't realize they are affected and can go years, even a lifetime, suffering from the condition and not knowing it.

So how do you know if you have sleep apnea, or just a snoring problem? Sleep experts recommend that if you have a partner who notices you are snoring heavily and gasping for breath as you sleep, or you wake up in the morning and find you can't function during the day, because you a sleepy, it's best to talk to you doctor. Prior studies have shown that sleep apnea can be a precursor to hypertension, weight gain, diabetes, as well as heart disease and stroke. It is also linked to excessive daytime sleepiness, which lowers performance in the workplace and at school, and increases the risk of injuries and death from drowsy driving and other accidents.

"It's really up to the patient to make the first move, to go to the doctor and ask to be tested.” explains Twery, "There are a lot of treatments out there that can help. And people need to follow them. Because sleep apnea has no pain with it, many people think it can't hurt them. But research shows, that sleep apnea can and will hurt your body, especially if it goes undetected."

The next step for this project? Researchers will start clinical trial studies that can help scientists determine if treating sleep apnea can lower a person's risk of stroke and other diseases.

Editor's Note: Medical news is a popular but sensitive subject rooted in science. We receive many comments on this blog each day; not all are posted. Our hope is that much will be learned from the sharing of useful information and personal experiences based on the medical and health topics of the blog. We encourage you to focus your comments on those medical and health topics and we appreciate your input. Thank you for your participation.

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Filed under: Heart • Sleep

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Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.