News briefs: Total knee replacements on the rise, despite high costs

The amount of total knee replacements in the United States has more than doubled since 1991. This may reflect an expanding pool of older adults and a desire to maintain a more active lifestyle that is possible only if arthritic knees are replaced.

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News briefs: Biologic therapy doesn’t raise cancer risk in people with rheumatoid arthritis

Despite theoretical reasons to worry that biologic response modifiers may raise cancer risk, it appears they don’t significantly raise the risk of malignancy. The drugs can dramatically improve inflammation in people with rheumatoid arthritis.

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