Trauma: The Knee & the Board

On the beaches of Southern California, the odd-looking knobs that can be seen protruding just below the kneecaps and on the top of the feet of suntanned surfboarders are generally recognized as a status symbol, the mark of a practiced wave rider. The medical significance of the strange lumps is a knottier problem, and West Coast doctors are now seeing more and more evidence of such surf board trauma.

Flexed Feet. The Pacific off Southern California is relatively cold, averaging about 60°F. even in summer. A surfer may get uncomfortably chilled if...

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