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A new study has found that overuse injuries account for more than one-quarter of all injuries suffered byU.S. collegiate athletes.

The majority of the overuse injuries (62 percent) was experienced by women, especially those who played field hockey, soccer, softball, and volleyball.

“Overuse injuries may present not only physical challenges, but also psychological ones that could significantly affect an athlete’s recovery and performance,” study co-author Tracey Covassin said in a journal news release.

“Understanding the frequency, rate and severity of overuse injuries is an important first step for designing effective injury-prevention programs, intervention strategies and treatment protocols to prevent and rehabilitate athletes with these types of injuries,” Covassin said.

A new research has suggested that there appears to be an association between Depo-Provera, an injectable form of progestin-only birth control, and an increased risk of breast cancer in young women.

The study found that recent use of the injectable contraceptive (formally called depo-medroxyprogesterone acetate or DMPA) for a year or longer was linked with a 2.2-fold increased risk of invasive breast cancer.

“Although breast cancer is rare among young women and the elevated risk of breast cancer associated with DMPA appears to dissipate after discontinuation of use, our findings emphasize the importance of identifying the potential risks associated with specific forms of contraceptives given the number of available alternatives,” study leader Dr. Christopher Li, a breast cancer epidemiologist at the Fred Hutchinson Cancer Research Center in Seattle, and colleagues wrote.

“In the United States, many women have numerous options for contraception, and so it is important to balance their risks and benefits when making contraceptive choices,” Li noted in a news release from the research center.

The findings are published online and in the April 15 print issue of the journal Cancer Research.

Researchers have reported that a non-invasive scan may someday help medical practitioners track the progress of prostate cancer and help guide treatment.

Known as a prostate cancer-specific radiotracer, the imaging tool has only been tested successfully in mice so far but a team from Memorial Sloan-Kettering Cancer Center in New York City said this technology may help determine cases where prostate cancer has spread to the bone.

Findings of the study were to be presented Saturday at the American Association for Cancer Research annual meeting in Chicago, and are also being published in Cancer Discovery.

Dr. Erik Goluboff, an attending urologist atBeth Israel Medical Center,New YorkCity, agreed that, “this is an exciting study using a novel radiotracer to detect PSA-expressing tissues throughout the body.”

He believes that the new tool’s “greatest strength would be in monitoring changes in PSA expression in tissues as a result of various treatments. If a treatment showed a marked change, it could continue to be used in that patient, hence “personalized” medicine. If a specific change did not occur, that treatment could be abandoned and another tried instead. Since these changes could not be detected based on a PSA blood test alone, this new test would be very helpful in determining early on which therapy to choose in a given patient.”