You may have seen these articles in your national newspapers, often run as front page headlines on days where there is little other big news, or in the first few pages of the newspaper. The tabloid press does, of course, tend to sensationalise its reports somewhat, and will often come up with some pretty wild examples, and some farfetched expectations for a new treatment's future; there are often pills for curing cancer, or studies which show aspirin will help you live forever etc.
If you are truly interested in modern medicine and the most up to date reports on new diagnostic procedures and tools, treatments and medications, scientific journals are the best place to look. They feature in depth reports on the very latest medical and technological advances, and often include a fair amount of background work to give their research and discoveries some context.
Science Daily (www.sciencedaily.com) has a health and medicine section which is always kept well up to date; it's a great resource for cutting edge medicine.