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Plague May Have Infected Humans Earlier Than Thought

THURSDAY, Oct. 22, 2015 (HealthDay News) — Plague infected humans thousands of years earlier than previously believed, a new study suggests.

Researchers analyzed DNA from the teeth of Bronze Age human remains in Europe and Asia and found signs of plague infections about 4,800 years ago. That is 3,300 years earlier than prior evidence.

But it was at least another thousand years before the plague-causing Yersinia pestis bacterium went through genetic changes that enabled it to spread via fleas and to avoid the host immune system, the new study contends.

The study was published Oct. 22 in the journal Cell.

“We found that the Y. pestis lineage originated and was widespread much earlier than previously thought, and we narrowed the time window as to when it developed,” senior author Eske Willerslev of the Center for GeoGenetics at the University of Copenhagen, Denmark, said in a journal news release.

“This study changes our view of when and how plaque influenced human populations and opens new avenues for studying the evolution of diseases,” Willerslev added.

The researchers plan to search for evidence of plague in other regions and time periods to learn more about the disease, which has caused devastating outbreaks throughout human history.

The investigators will also seek ancient DNA remains of other blood-borne bacteria and viruses.

“Our findings reveal that one can find ancient pathogenic microbes in ancient human material showing no obvious morphological signs of disease,” Willerslev said. “So plague is just one disease to look at, and one could explore all kinds of diseases like this in the future.”

More information

The U.S. Centers for Disease Control and Prevention has more about plague.





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ADHD May Have Different Effects on Brains of Boys and Girls

By Tara Haelle
HealthDay Reporter

THURSDAY, Oct. 22, 2015 (HealthDay News) — Attention-deficit/hyperactivity disorder (ADHD) manifests itself differently in the brains of girls than in the brains of boys, new research suggests.

The results may help scientists better understand how ADHD affects boys and girls in unique ways, the researchers said.

“The findings showed differences in the white matter microstructure between boys and girls,” said study co-author Lisa Jacobson, a pediatric neuropsychologist at the Kennedy Krieger Institute, in Baltimore. White matter helps different regions of the brain communicate with each other.

“These structural differences were associated with observed behavioral differences,” Jacobson said. “Taken together, our findings provide preliminary evidence for unique differences in the brain’s white matter structure and function between boys and girls with ADHD.”

Kathryn Moore, a psychologist at Providence Saint John’s Child and Family Development Center in Santa Monica, Calif., said, “Females are more likely to present with the inattentive symptoms of ADHD, while males are more likely to present with hyperactive and impulsive features of ADHD.”

Moore, who was not involved with the new research, noted that the study authors could not explain the reasons for their findings. ADHD is also diagnosed in boys at about twice the rate as in girls, she said, but this study does not necessarily explain why that is.

“The most striking finding in this study is that there are differences in brain functioning between boys and girls with ADHD,” Moore added. “Perhaps the disorder of ADHD is caused by these neurological differences, or perhaps ADHD causes these neurological differences.”

For the study, 120 children between the ages of 8 and 12 had a type of MRI called diffusion tensor imaging, which allows researchers to see neurological differences in the brain. Half of the children had been diagnosed with ADHD. The children without ADHD were matched to the children with ADHD, based on age, IQ and handedness (being left- or right-handed). Each of the groups, with and without ADHD, had 30 boys and 30 girls.

The researchers found several differences in the white matter of children with ADHD compared to those without ADHD, but the variations showed up in different parts of the brain based on gender.

In boys with ADHD, the differences showed up in the primary motor cortex, a part of the brain responsible for controlling basic motor functions. In girls with ADHD, the differences appeared in the prefrontal regions of the brain, which control motivation and ability to regulate emotions, the study authors said.

It’s possible that the differences seen relate to how the different sexes mature, suggested Dr. Glen Elliott, chief psychiatrist and medical director of Children’s Health Council in Palo Alto, Calif.

“Boys and girls differ in a number of different ways, obviously including rates of maturation,” Elliott said. He added that differences in the brains of males and females are present even during fetal development.

“Certainly some aspects of these findings might be reflective of previous studies done by other researchers showing that ADHD is associated with a delay in maturation, especially of frontal brain structure,” Elliott said.

Moore explained that the differences seen in the brain functioning of people with ADHD, regardless of sex, is generally in the same larger region of the brain, the frontal lobe. The frontal lobe controls executive functioning, which involves “impulse control, decision-making, cognitive flexibility and planning,” she said.

Elliott said: “Possibly more relevant are the findings that, as they move through their teens into adulthood, boys with ADHD tend to get into trouble with externalizing problems, such as conduct disorder and reckless behaviors, while girls with ADHD have, in general, a more internalizing presentation, with depression, anxiety, eating disorders and self-harm.”

But none of this might make a difference in how the disorder is treated, Elliott said.

“The ‘why’ of these differences remains unclear and could well be associated with quite distant other parts of the brain that connect to the regions being studied,” Elliott said. “Similarly, the findings do not really suggest unique treatment options.”

The primary first-line treatment for ADHD is still medication, usually stimulants, Moore said.

“Most psychologists would also advocate for additional interventions, such as using rewards and consequences to shape behavior, learning better problem-solving skills and increasing effective communication between parents and the child,” Moore added.

The study findings were published Oct. 22 in the Journal of the American Academy of Child and Adolescent Psychiatry.

More information

For more about ADHD, visit the U.S. Centers for Disease Control and Prevention.





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This Woman Made a Photo Series to Capture Every Stage of Her Mastectomy Recovery

breast-choice

Photo: Youtube/ Blast ‘Em Photography , Hair and Makeup: Aniela McGuinness

Last October, just three days before she her appointment to schedule a preventative double mastectomy, Aniela McGuinness was diagnosed with stage 1 breast cancer. As a carrier of the BRCA 1 mutation, the actress from Hollywood, Fla., knew she was at high risk for the disease. Still, the news came as a shock: “I have to admit that I didn’t think it would happen to me, especially at 31,” she wrote on her blog.

McGuinness began googling before-and-after photos of mastectomies, and found “a heartbreaking array of faceless women’s maimed breasts under fluorescent lighting,” as she put it. “You see your future, and it’s scary,” she explained in a video announcement on her YouTube channel. “I did not want other women to have those as the only images they saw of mastectomies.”

RELATED: 12 Things That Probably Don’t Increase Breast Cancer Risk

So, as she explains above, she decided to create her own photo project, chronicling each stage of her treatment and recovery. The result is four very unexpected and empowering images. Shot by Blast ’Em Photography, each one captures how McGuiness actually felt, from the the week before her mastectomy through her chemotherapy and finally, her reconstruction surgery.

First up: her before picture—an inspirational ode to Rosie the Riveter.

Photographer: Blast 'Em, Hair and Makeup: Aniela McGuinness, Model: Aniela McGuinness

Photographer: Blast ‘Em, Hair and Makeup: Aniela McGuinness, Model: Aniela McGuinness

McGuiness wanted to remember what her breasts looked like—and “to capture the ‘We CAN Do It’ spirit going into the biggest battle of my life,” she wrote. (You can see the uncensored photo on her blog.)

Frankenstin

Photo: Blast ‘Em, Hair and Makeup: Brynn Berg

A few weeks after her mastectomy, McGuinness dressed up as the Bride of Frankenstein. The stitches on her shoulders, chest, and face are part of her costume. But the four-inch wounds on her breasts are very real. There are tissue expanders implanted in each breast to gradually make room for her future implants. But they felt “weird, and hard, and oddly shaped,” she said in her video. “I wanted women to see the beauty and the pain and what the moment felt like.”

RELATED: 15 Worst Things You Can Say to Someone Battling Breast Cancer

INSERT MANNEQUIN PIC

Photographer: Blast 'Em, Hair and Makeup: Aniela McGuinness, Model: Aniela McGuinness

Photo: Blast ‘Em,  Makeup: Tiffany Alfonso

With all of the hair on her body gone, thanks to the chemo, and her tissue expanders fully inflated, McGuinness felt like a mannequin—a notion that inspired this third image, which she pulled off with the help of make-up artist Tiffany Alfonso.

Photographer: Blast 'Em, Hair and Makeup: Aniela McGuinness, Model: Aniela McGuinness

Photo: Blast ‘Em, Hair and Makeup: Aniela McGuinness

The last picture—shot two months after her reconstruction—shows McGuinness cancer-free, goofing around with a pair of stick-on prosthetic nipples on her tear-drop shaped gummy silicon implants.

The joyful way McGuinness embraced her new breasts isn’t meant to belittle or distract from the pain and grief cancer causes. McGuinness is painfully aware of how serious and terrible this disease can be. In addition to her own health scare, she lost her mother to ovarian cancer in 2013. But she chose to focus her photo project—and the documentary she’s currently shooting—on a different aspect of her experience, and managed to convey an incredibly powerful message: that even in the most frightening and darkest of times, there can be humor and light.

RELATED: The Perfect Breast Shape, According to Science




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11 New Eye Creams That Will Make You Look Rested… Even When You’re Not

Photo: Getty Images

Photo: Getty Images

mimi-logo-il6

Eye cream is one of those ever-important products that have intrigued me since middle school. It reminds me of the time I spent watching my mother get ready for bed, she would ever so carefully dab on a fancy elixir around her eyes each night. Since then, I’ve been an eye cream freak. I won’t leave the house or go to bed without, like my mother, patting the latest offering across my lids and under-eye area.

I’ve rounded up the best new eye pampering products for the coming season, because it’s time to get your own nightly routine started. Your skin will thank you.

1. Caudalie Vinosource S.O.S. Morning Eye Rescue

caudalie eye rescue

$34; sephora.com

2. DERMAdoctor Kakadu C Eye Soufflé

DERMAdoctor eye souffle

$68; sephora.com

3. AmorePacific Intensive Vitalizing Eye Essence

AmorePacific revitalizing cream

$95; sephora.com

4. Fresh Lotus Youth Preserve Eye Cream

Fresh Lotus Youth preserve

$16.50; sephora.com

5. Dermalogica Multivitamin Power Firm

Dermalogica multivitamin

$58; nordstrom.com

 

6. Jurlique Herbal Recovery Advanced Eye Serum

Jurlique herbal recovery

$48; sephora.com

7. Kiehl’s Since 1851 Creamy Eye Treatment with Avocado

Kiehls with avocado

$47; nordstrom.com

8. M·A·C Lightful C Vibrancy Eye Cream

MAC lightful c

$35; nordstrom.com

9. SK-II Essential Power Eye Cream

SK-II Essential Power Eye Cream

$125; sephora.com

10. Valmont Eye & Mouth Contour Corrective Cream

Valmont contour corrective cream

$140; nordstrom.com

11. Pevonia Lumafirm Lift & Glow Eye Contour

Pevonia Lumafirm lift

$73.50; pevonia.com

This article originally appeared on MIMIchatter.com.

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10 Concealers That Make You Look Photoshopped (But in a Good Way)

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popsugarblack_small.jpg MIMI Chatter is an endless stream of beauty content. We bring together the must-knows and the how-tos from your favorite sites, beauty influencers, our editors, and YOU.



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Common Shoulder Injury Heals Well Without Surgery: Study

THURSDAY, Oct. 22, 2015 (HealthDay News) — A common shoulder injury that is usually repaired with surgery can heal just as well with nonsurgical treatment, a new study suggests.

And, the researchers added, those who decide against surgery for a dislocated shoulder joint develop fewer complications and get back to work sooner. But, surgery patients seem more satisfied with the appearance of their shoulder after treatment.

Found at the top of the shoulder between the collarbone and the shoulder blade, the acromioclavicular (AC) joint is often injured during sports. It can also be dislocated in a fall or car accident. People with a minor injury can wear a sling and undergo physical therapy. More severe dislocations are often treated with surgery involving a plate and screws, according to the researchers.

“For severe AC joint dislocations, surgery is the common practice but there’s not much evidence to suggest this is actually the best treatment,” study author Dr. Michael McKee said in a news release from St. Michael’s Hospital in Toronto, where he is an orthopedic surgeon.

In order to investigate this issue further, the study’s authors assigned 83 people with moderate to severe AC joint dislocations to either undergo surgery and rehabilitation or receive nonsurgical treatment with a sling and rehab.

The participants were followed for two years. The researchers kept track of their complications, level of disability and satisfaction with their shoulder’s appearance.

The study, published Oct. 22 in the Journal of Orthopaedic Trauma, found that patients treated without surgery could move their shoulders better than those who had surgery at follow-up sessions six weeks and three months after their injury.

After six months, researchers found no major differences between the two groups.

“Three months after the initial injury, more than 75 percent of the patients who did not have AC joint surgical repair were able to return to work, whereas only 43 percent of those who underwent surgery were back at work,” McKee said.

Of 40 patients who had surgery, seven developed major complications such as a loose plate or a deep wound infection. Seven others, meanwhile, experienced minor infection, numbness at the point of the incision or another minor complication.

In contrast, of the 43 patients treated with a sling and rehabilitation, only two had major complications, the study found. Both were the result of a repeat injury.

Surgical patients, however, were more satisfied with the appearance of their shoulder after treatment. Only 5 percent of the surgical patients were unhappy with their appearance a year after treatment, compared to 16 percent of nonsurgical patients. After two years, the difference was even greater, with 21 percent of nonsurgical patients dissatisfied compared to 4 percent of those who had surgery.

“The main advantages of surgery are that the joint is put back in place and the shoulder appears more symmetrical and pleasing to the eye. The long-term implications of surgery for AC joint dislocation remain unclear when compared to nonoperative treatment,” McKee said.

While appearance is a consideration, McKee said doctors should “think twice” before recommending surgery for an AC joint dislocation, no matter how severe. “Patients who forgo surgery return to work sooner, experience less disability during the first months after injury and have fewer complications,” he concluded.

More information

The American Academy of Orthopaedic Surgeons provides more information on shoulder dislocation.





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Rare Condition Can ‘Masculinize’ Women

By Amy Norton
HealthDay Reporter

WEDNESDAY, Oct. 21, 2015 (HealthDay News) — For most women, some hair loss from the scalp along with more body hair are just regular signs of aging. In some cases, though, these changes may stem from a little-known condition that sends testosterone levels soaring.

Writing in the Oct. 22 New England Journal of Medicine, doctors describe just such a case: A 57-year-old woman who came to them with body-hair growth, balding, an increasingly male-sounding voice, and other signs of excessive testosterone levels.

After ruling out some of the usual suspects — including tumors of the adrenal glands and ovaries — her doctors eventually settled on an obscure diagnosis known as ovarian hyperthecosis.

It’s a condition that many doctors may not be aware of. Even endocrinologists — specialists in hormonal disorders — see relatively few cases come their way, said Dr. Graham McMahon, an endocrinologist who was at Brigham and Women’s Hospital in Boston when he co-wrote the case report.

Ovarian hyperthecosis arises when certain cells in the ovaries overproduce androgens — “male” hormones such as testosterone, the report authors said.

“We don’t really know how common it is,” said Dr. Margaret Wierman, a spokesperson for the Endocrine Society who was not involved in the case, but has treated and written about ovarian hyperthecosis.

There have been no large studies on the condition, so its prevalence is unclear. In fact, Wierman said, there has been little research of any kind beyond case reports.

“We don’t know what causes ovarian hyperthecosis,” she said. “We don’t know what the risk factors might be.”

One suspected risk factor, Wierman said, is polycystic ovary syndrome (PCOS), a fairly common disorder that affects women of childbearing age.

As with hyperthecosis, PCOS involves an overproduction of androgens in the ovaries. The symptoms include irregular menstrual periods and fertility problems, acne and weight gain.

One theory, Wierman explained, is that ovarian hyperthecosis could be a more-severe form of PCOS.

“Some women who develop ovarian hyperthecosis after menopause might have had milder PCOS that was never caught — maybe because it was just causing irregular periods,” Wierman said.

But after menopause, when estrogen levels drop, those women could see worsening problems related to their high androgen concentrations.

That, however, remains only a theory.

The patient in the current case was a 57-year-old woman who’d visited an outpatient clinic after several years of bothersome body changes. She’d been noticing facial hair growth for the past three years; then other, more “prominent” symptoms had cropped up in the previous year — including a deepening voice, hair growth on her abdomen, balding on the crown of her head, and an increased libido.

Lab tests showed she had high testosterone levels, but normal levels of a hormone called DHEAS, which is released by the adrenal glands.

If a tumor in the adrenal gland had been the cause of the woman’s symptoms, her DHEAS levels would have been high, Wierman said.

After more tests — including CT and ultrasound scans — produced no clear diagnosis, she ended up at Massachusetts General Hospital for further evaluation, according to the case report.

Ultimately, the woman was diagnosed with ovarian hyperthecosis and underwent surgical removal of both ovaries — a standard treatment for women who are past their childbearing years.

Three months later, her testosterone levels had plummeted. (Because removing her ovaries also sent her estrogen to undetectable levels, she developed severe hot flashes and needed hormone therapy, in the form of estrogen patches.)

There was only a mild improvement in her balding, and no change in body hair — so she ultimately turned to medication for her hair loss, and electrolysis (a type of permanent hair removal) for the body hair, the report said.

“Some of the effects of ovarian hyperthecosis tend to be persistent, like facial hair,” said McMahon, who is currently president of the Accreditation Council for Continuing Medical Education, in Chicago.

However, he said, removing the source of the excess testosterone often improves the “metabolic abnormalities” commonly seen in ovarian hyperthecosis. Those include high blood pressure and diabetes.

McMahon stressed that women should not be “alarmed” by changes that can come with menopause — including thinning hair on the scalp, some body-hair growth, and weight gain around the middle.

“Those changes are very common among postmenopausal women,” he said. “And only a small fraction will have a medical condition underlying it.”

But if the changes come on “rapidly” or severely, that is a red flag, according to McMahon. And any time a woman feels concerned about signs or symptoms that arise after menopause, she should feel free to talk to her doctor, he said.

Primary care doctors can easily measure blood levels of testosterone and DHEAS, McMahon pointed out.

More information

The North American Menopause Society has more on menopause and body changes.





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B Vitamin May Help Ward Off Some Skin Cancers

By Dennis Thompson
HealthDay Reporter

WEDNESDAY, Oct. 21, 2015 (HealthDay News) — A cheap and readily available vitamin supplement appears to reduce a person’s risk of some skin cancers, a new clinical trial indicates.

A form of vitamin B3 called nicotinamide appears to reduce non-melanoma skin cancers by 23 percent when taken twice daily, the Australian researchers reported.

“It’s safe, it’s almost obscenely inexpensive and it’s already widely commercially available,” said senior study author Dr. Diona Damian, a professor of dermatology at the University of Sydney.

Nicotinamide costs less than $10 for a month’s supply and is available at pharmacies and health food stores, she said.

However, more study is needed before researchers can say whether everyone would benefit from the supplement. “It’s not something we’d recommend at this stage for the general population,” Damian said.

Skin cancer is the most common form of cancer in the United States, with about 5 million cases treated every year at a cost of about $4.8 billion, Damian said.

Common skin cancers tend to grow slowly and can be cured if found and treated early, according to the American Cancer Society. These types of skin cancer include basal and squamous cell carcinoma. Melanoma, a more dangerous type of skin cancer, accounts for just 73,000 cases a year, according to the cancer society.

Ultraviolet rays from the sun cause most skin cancers by damaging the DNA of skin cells, Damian said.

UV radiation also hampers the body’s ability to fight off cancer, depleting the energy that skin cells need to repair damaged DNA and profoundly suppressing the skin’s immune system, she explained.

Earlier studies had indicated that nicotinamide can provide skin cells with an energy boost, enhancing DNA repair and strengthening the skin’s immune system, Damian said.

To see whether this would help protect against skin cancer, researchers launched a clinical trial involving nearly 400 high-risk patients who’d had at least two non-melanoma skin cancers during the previous five years. Their average age was 66 and two-thirds were men. Many also had chronic health conditions, such as arthritis, high blood pressure, or heart or lung disease, according to the researchers.

Half of the group took nicotinamide twice daily for a year. The other half took a placebo. Dermatologists checked for skin cancer every three months.

The people taking nicotinamide showed immediate benefits. “This reduction in skin cancers seemed to start as early as the first three-month visit,” Damian said.

By the end of the one-year study period, new non-melanoma skin cancer rates were down 23 percent in the nicotinamide group compared to the placebo group, the researchers found.

The vitamin supplement also appeared to reduce the numbers of thick, scaly patches of skin that can become cancer. Those patches were reduced in the nicotinamide group by 11 percent at three months, and by 20 percent at nine months of treatment.

However, those benefits quickly disappeared during the study’s follow-up period. “When people stopped taking their tablets after 12 months, the benefit was no longer seen,” Damian said. “In other words, you need to continue taking the tablets in order for them to be effective.”

Nicotinamide did not appear to cause any more adverse events than the placebo, the researchers added.

Damian said that nicotinamide is very different from a more commonly known form of B3 called niacin. People who take high doses of niacin can suffer from headaches, flushed skin and low blood pressure. “These side effects are not and were not seen with nicotinamide,” she said.

Further studies are planned to determine if nicotinamide can help reduce skin cancers in people with suppressed immune systems, such as organ transplant recipients who have to take lifelong immune suppressants, researchers said. People with suppressed immune systems have skin cancer rates up to 50 times higher than those with normal immune systems, the researchers noted.

Dr. Peter Yu, president of the American Society of Clinical Oncology, said that the new study may provide doctors with a tool to head a major form of cancer off at the pass.

“We all know that we clamor for preventing rather than treating diseases, and this is a major advance for us,” said Yu, director of cancer research at Palo Alto Medical Foundation. “With just a daily vitamin pill, along with sun protection and regular skin cancer screenings, people at high risk for these types of skin cancers have a good preventive plan to follow.”

Funding for this study was provided by the National Health and Medical Research Council of Australia.

More information

For more on skin cancer, visit the U.S. National Institutes of Health.





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Knee Replacement Brings Less Pain, Better Function

By Steven Reinberg
HealthDay Reporter

WEDNESDAY, Oct. 21, 2015 (HealthDay News) — Total knee replacement usually results in greater pain relief and better joint function after a year than nonsurgical arthritis treatment, researchers report.

But baby boomers shouldn’t automatically rule out physical therapy for moderate to severe knee arthritis, the authors of the new study said.

“There are nearly 700,000 knee replacements done in the United States each year, but evidence of their benefit has been lacking,” said lead author Soren Thorgaard Skou, a researcher in the musculoskeletal function and physiotherapy unit at the University of Southern Denmark in Odense.

By 2010, knee replacement had become the leading inpatient surgery performed on adults 45 and over in the United States, according to data from the U.S. National Hospital Discharge Survey. Average age of the recipients was 66.

For the study, Skou’s team randomly assigned 100 patients with moderate to severe knee arthritis to either total knee replacement plus 12 weeks of nonsurgical treatment or to nonsurgical treatment only. The nonsurgical group received physical therapy, diet advice, shoe insoles and pain medication.

After one year, 85 percent of the joint replacement patients reported clinically significant improvement in pain compared to 68 percent of the nonsurgical group, the study found. Quality of life was boosted in the joint replacement group as well, and these surgical patients made bigger gains in ability to walk, climb stairs and perform other daily activities.

However, complications were much less likely in the nonsurgical group.

Dr. Jeffrey Katz is a professor of orthopedic surgery at Harvard Medical School in Boston, and author of an accompanying journal editorial. He commented, “We have never before had a randomized controlled trial of knee replacement that permits a direct comparison of knee replacement versus physical therapy.”

The study shows knee replacement is much better for pain relief, but physical therapy is often effective and should be viewed as a viable option, especially for those concerned about the risks of surgery, Katz said.

Those risks include the possibility of blood clots in the legs (deep vein thrombosis) and knee stiffness that requires manipulation to restore normal motion, the study authors said.

“Patients have a choice,” Katz said. “Knee replacement is among the most successful interventions in modern medicine, but physical therapy is a reasonable choice for patients as well.”

Skou recommended discussing the procedure with your doctor to determine if the risks are worth the potential benefits.

Patients can try nonsurgical options such as weight loss and physical therapy, and then see if a knee replacement is necessary, Skou said.

“A lot of patients do not need the surgery,” he added.

Patients should also be warned that current replacements last 10 to 15 years, Skou said. When the artificial joint wears out, another operation will be needed. The second replacement is less likely to be as effective as the first, he said.

“If you can postpone the first surgery, then you may be able to prevent the second surgery,” Skou said.

Another consideration: Surgery is irreversible, while nonsurgical treatment leaves the surgical option open, he pointed out.

The report was published Oct. 22 in the New England Journal of Medicine.

More information

For more on knee replacement, visit the American Academy of Orthopedic Surgeons.





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Secondhand Smoke in Infancy May Harm Kids’ Teeth

By Steven Reinberg
HealthDay Reporter

WEDNESDAY, Oct. 21, 2015 (HealthDay News) — Want your baby to grow into a tot with a cavity-free smile? Don’t smoke when he or she is around.

Children exposed to secondhand smoke at 4 months of age may be at risk for tooth decay by age 3, Japanese researchers report.

Those children were roughly twice as likely to have cavities as kids whose parents didn’t smoke. A mother’s tobacco use during pregnancy was not a factor, the researchers added.

“Secondhand smoke is one of the major public health problems still unsolved,” said lead researcher Dr. Koji Kawakami, chairman of pharmacoepidemiology and clinical research management at Kyoto University.

Exposure to secondhand smoke is widespread, affecting four out of 10 kids around the world, he said.

“In our study, more than half of children had family members who smoked, and most smokers were their fathers,” Kawakami said.

He emphasized that this study only shows an association between exposure to secondhand smoke and cavities, however, not that smoking exposure causes tooth decay.

Even so, the findings support increased efforts to reduce secondhand smoke, he said.

“For example, education on the harm of secondhand smoke would increase if dentists become aware of the cavities risk due to secondhand smoke as well as tobacco smoking of their patients,” Kawakami said.

The report was published Oct. 21 in BMJ.

Dr. Jonathan Shenkin, a clinical associate professor of health policy, health services research and pediatric dentistry at Boston University who is a spokesman for the American Dental Association, said evidence of a link between exposure to secondhand smoke and increased risk of tooth decay has mounted over the past decade.

“Like the population in this study, exposure to secondhand smoke continues to be a problem in the U.S., suggesting value in additional research,” he said.

For this study, researchers collected data on nearly 77,000 children born between 2004 and 2010. The children were examined at birth, 4, 9 and 18 months of age and at 3 years of age.

In addition, their mothers completed questionnaires about smoking in the home, along with their child’s exposure to secondhand smoke, their dietary habits and dental care.

About 55 percent of the parents smoked and almost 7 percent of the children were exposed to secondhand smoke, the researchers found.

In all, nearly 13,000 cases of cavities were identified.

Dr. Rosie Roldan, director of the pediatric dental center at Nicklaus Children’s Hospital in Miami, said that tobacco smoke may change the saliva and other biochemistry needed to clean and protect teeth.

“Secondhand smoke puts children at risk for heart disease, breathing difficulties, and possibly for cavities,” she said.

More information

Learn more about secondhand smoke from the U.S. Centers for Disease Control and Prevention.





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