Here are some of the latest health and medical news developments, compiled by editors of HealthDay:

BPA in Canned Foods Cause for Concern, Group Says

Measurable levels of the chemical additive bisphenol A (BPA) were found in a variety of canned goods, including some that claimed to be BPA-free, according to an analysis released this week by the nonprofit advocacy group Consumers Union.

Studies have linked BPA to reproductive abnormalities and increased risk of diabetes and cancer. Some countries have banned the sale of baby bottles made with BPA, which is a plastic hardener and a component of epoxy resin. BPA is used in many products, including food-can linings.

Consumers Union said children who eat multiple servings of some of the food products included in the analysis could ingest amounts of BPA "near levels that have caused adverse effects in several animal studies," the Los Angeles Times reported.

In a letter to the U.S. Food and Drug Administration, Consumers Union said the findings lend support to calls to ban BPA from use in materials that come in contact with foods and beverages.

An FDA spokesman told the Times that a review of existing evidence about BPA's health effects was nearing completion, and that the agency would "make a decision how to proceed" by the end of the month.

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Breast Cancer May Change When It Spreads: Study

About 40 percent of breast tumors change when they spread, which means that many patients with metastatic breast cancer may require treatment alterations, say Scottish researchers.

They examined 211 breast tumors that had traveled to the lymph nodes in the armpit. This is the location breast cancer usually spreads to first, BBC News reported. The researchers were surprised to find that the breast cancer had changed in so many patients and in so many ways.

"This suggests there is a need to test which type of disease a woman has in the lymph nodes, because it could radically alter the course of treatment she receives," said lead researcher Dr. Dana Faratian, of the Breakthrough Breast Cancer Research Unit in Edinburgh.

"This research may show why some women whose cancer has spread to the lymph nodes do not respond to treatment," said Professor David Harrison, director of Breakthrough Breast Cancer, BBC News reported.

The study appears in the journal Annals of Oncology.

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Tests Can Detect Early Dementia: Study

Early dementia can be detected using memory and language tests, say British researchers.

Their 20-year study included 241 elderly people who were given regular tests to assess their thinking and cognitive abilities, BBC News reported. Scrutiny of the test results revealed subtle clues associated with later mental impairment.

The researchers found that participants who had more difficulty with language expression, learning and recall tasks went on to develop mild cognitive impairment or pre-dementia.

The study appears in the journal Neurology.

Most dementias are diagnosed only after considerable loss of brain tissue. These findings could help lead to earlier diagnosis of dementia, which is important because treatment is most effective when started early, BBC News reported.

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Cereal's 'Immunity' Claim Outrages Experts

Health and nutrition experts are attacking Kellogg for claims that one of its cereals benefits children's immune systems because it contains increased levels of vitamins A, C and E.

Bold lettering on the front of Cocoa Krispies boxes claims the cereal "Now helps support your child's IMMUNITY," a declaration likely to catch the eye of parents worried about the danger the H1N1 virus presents to their children.

"The idea that eating Cocoa Krispies will keep a kid from getting swine flu, or from catching a cold, doesn't make sense," Marion Nestle, a nutrition professor at New York University, told USA Today. "Yes, these nutrients are involved in immunity, but I can't think of a nutrient that isn't involved in the immune system."

After she saw the cereal box claims in August, she sent a letter to the U.S. Food and Drug Administration, which has jurisdiction over false or misleading labeling. Nestle hasn't heard back from the agency.

Many others are outraged by the marketing tactic. The City of San Francisco sent a letter to the FDA asking that it make Kellogg prove its claim, USA Today reported.

The claim "was not created to capitalize on the current H1N1 flu situation," said Kellogg spokeswoman Susanne Norwitz. The cereal was developed "in response to consumers expressing a need for more positive nutrition."

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FDA Rejects Cholesterol Drug Application

An application for a new cholesterol pill that combines Lipitor and Zetia has been rejected by the U.S. Food and Drug Administration because it wants more information about the manufacturing and stability of the combination drug.

The unusual decision was disclosed Monday by Merck & Co., which applied to the FDA in September for approval of the two-drug pill, the Associated Press reported. Lipitor and Zetia are approved for sale in the United States.

The FDA may only have minor questions about details of test results, or agency staff may have "found something they don't like," Steve Brozak, president of WBB Securities, told the AP.

Usually, the FDA accepts applications for experimental drugs and then reviews the extensive data that accompanies the applications. Information about how often applications are rejected up front wasn't immediately available.

"We do intend to refile" with additional data, Merck spokesman Ron Rogers told the AP.

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Diabetes Drug Label to Address Safety Concerns: FDA

A drug used to treat type 2 diabetes, Byetta, may contribute to kidney malfunction, the U.S. Food and Drug Administration warned Monday as it moved to revise safety information on the label.

Over a three-year period, the FDA received 78 reports of kidney problems, including kidney failure, among patients using Byetta, it said in a statement. Some of the patients had pre-existing kidney disease, while others were at risk of developing kidney disease.

"Health care professionals and patients taking Byetta should pay close attention to any signs or symptoms of kidney problems," said Dr. Amy Egan, of the Division of Metabolism and Endocrinology Products at the FDA's Center for Drug Evaluation and Research. "Patients also should be aware that problems with kidney function could lead to changes in urine color, frequency of urination or the amount of urine, unexplained swelling of the hands or feet, fatigue, changes in appetite or digestion, or dull ache in mid to lower back."

Patients with any of these symptoms should notify their physician right away.

Because of the safety concerns, the FDA is working with drug make Eli Lilly and Co. to update prescribing information on

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