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Men with low-grade prostate cancer are choosing robotic surgery and other expensive treatments, even though they probably don't need treatment at all, a study says. Less testing and waiting before deciding to treat would reduce harmful side effects in many cases.

Dr. Judith Salerno, a geriatrician, is replacing Nancy Brinker, the cancer philanthropy's founder and longtime chief executive. The change comes more than a year and a half after a decision to halt grants to Planned Parenthood plunged the group into controversy.

Replacing some dietary carbohydrates with vegetable fats may help keep prostate cancer from spreading. That's the word from a study of more than 4,500 men that looked at the effects of dietary changes after their initial diagnosis.

The Komen foundation has attributed the drop in walk participation, in part, to a crummy economy. But it's clear the organization underestimated the reaction to its short-lived decision in early 2012 to discontinue funding for breast cancer screening by Planned Parenthood.

The green light comes despite questions about whether the proton beam treatment is more effective than less expensive options. The two centers, about three miles apart, will compete for patients in the Washington area.

Mastectomies have become increasingly popular for women with breast cancer. That's a big turnaround from the 1980s, when women abandoned mastectomy in favor of breast-saving lumpectomy.

In 2004, Peter Obetz was in the middle of a divorce when he was diagnosed with esophageal cancer. He says the news was not only a wake-up call for him to change his life, but it also brought him closer to his friend Jeff Jarrett. He's been cancer-free since 2009.

The dose of radiation an astronaut would experience on a trip to Mars is higher than the annual limit set for workers at nuclear power plants. But Mars enthusiasts say the radiation threat isn't high enough to cancel the trip.

Inherited mutations of some genes can contribute to breast cancer risk. There are tests for a range of these uncommon mutations, but whether an insurer will pay for them varies, too.

In 2000, at age 28, Neeley Wells was diagnosed with ovarian cancer. She's been living with the disease since then, never in remission, alongside her husband and 14-year-old daughter. NPR's Rachel Martin talks with her to understand the experience of living with cancer.