"I'm very worried, " says Otis Brawley, chief medical officer of the American Cancer Society.
Kennedy likely will receive the chemotherapy drug Temodar during and after radiation, Brawley said.
Nor would extreme weight loss necessarily mean a bad prognosis if Jobs is being treated, Brawley says.
Brawley is also a key leader in the society's work to eliminate disparities in access to high-quality cancer care.
The opinions expressed in this commentary are solely those of Otis W. Brawley.
Otis Brawley, an epidemiologist and breast-cancer specialist who heads the American Cancer Society, notes such estimates are all statistical presumptions.
"If we actually use books like this to encourage healthy eating habits, we're going to prevent some cancers, " Brawley said.
He's "one of the thought leaders in the field, " said Dr. Otis Brawley, chief medical officer of the American Cancer Society.
"If you stop the Avastin, than the tumor comes back galloping, " says Otis Brawley, chief medical officer of the American Cancer Society.
Women should begin getting annual high-quality screenings at 40 at the same place so physicians have access to previous mammograms, Brawley said.
"The real lesson here is the danger of surrogate endpoints, " Brawley says.
Most New Yorkers would like to write off Mr Sharpton and Miss Brawley as ghosts of the racially charged politics of the 1980s.
What's more, Brawley noted, it may be difficult for a teenager to seek help from a doctor or counselor without a parent's knowledge.
"We want men who want to get screened to get screened, and men who don't want to get screened don't have to, " Brawley said.
CNN: Let men decide on prostate screening, cancer society says
This surprised me, and I asked Otis Brawley, chief medical officer of the American Cancer Society and a prostate cancer doctor himself, what he thought.
FORBES: Do Merck, Glaxo Prostate Drugs Raise Cancer Risk? Maybe Not
The cancer society's Brawley says better cancer screening tools are needed.
CNN: Let men decide on prostate screening, cancer society says
Brawley has come to see how the better patient groups evolve.
The new guidelines say that men can "be referred to reliable and culturally appropriate sources, " so the information doesn't have to come from a doctor, Brawley noted.
CNN: Let men decide on prostate screening, cancer society says
Otis Brawley, the chief medical officer of the American Cancer Society, had been one big naysayer, arguing that previous studies of Provenge didn't offer a clear benefit.
"It is not unusual for someone to delay getting treatment for several weeks or several months, " Dr. Otis Brawley of the American Cancer Society told CNN in July.
"It's a great book for adults to read because it has a lot of the concepts ... the scientific and medical concepts of treatment in it, " Brawley said.
Brawley said people believe mammography is better than it is.
Brawley said the book has helpful medical information for families.
"We're hitting a lot of base hits that move the science but don't mean a lot to patients, " says Otis Brawley, chief medical officer of the American Cancer Society.
Sharpton made national headlines in 1987 after he became an advocate for Tawana Brawley, a 15-year-old, black New Yorker who claimed six white police officers abducted and raped her.
"I'm still not 100% convinced, but I'm convinced enough that I actually believe the drug should be FDA approved and I would offer this drug to my patients, " Brawley says now.
Brawley says he has some experience with supermarket tabloids.
"What we are trying to say to men is the harms (of prostate screening) are better proven than the benefits, " said Dr. Otis Brawley, chief medical officer of the American Cancer Society.
CNN: Let men decide on prostate screening, cancer society says
Brawley noted at the time that the task force was essentially telling women that mammography at ages 40 to 49 saves lives -- just not enough of them to recommend annual screening.
Mr Sharpton has been made to admit that he never asked Miss Brawley about the rape before accusing Mr Pagones (his explanation: he would not dream of discussing sex with a young girl).
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