More and more evidence today of the link between obesity and cancer.Michele Gielan has that story and more in today's health report.As many as 100-thousand cases of cancer could have been prevented if Americans lost some weight.(takevo)That's the word from a new report that links OBESITY with many of the cancer cases in the U-S.Obesity contributed to nearly half the cases of endometrial cancer - which is cancer of the uterus and a third of esophageal cancer cases.(wipevo)The U.S spends more than twice as much in healthcare as many other countries.Still - according to a new survey, the nation's health system lags behind in key areas.The international report found Americans are more likely to have trouble getting medical treatment because of insurance restrictions or cost.(wipevo)Green tea may help ward off oral cancer.Researchers gave around 40 volunteers with pre-malignant mouth lesions GREEN TEA extract for three months.They found nearly 60 percent showed some kind of clinical response.(oncam)Those are some of today's top medical stories.I'm Michelle Gielan - CBS News - New York.Michelle Gielan has that story and more in today's health watch report.