Test of Lincoln DNA sought to prove cancer theory

(AP) -- John Sotos has a theory about why Abraham Lincoln was so tall, why he appeared to have lumps on his lips and even why he had gastrointestinal problems. The 16th president, he contends, had a rare genetic disorder - one that would likely have left him dead of cancer within a year had he not been assassinated. And his bid to prove his theory has posed an ethical and scientific dilemma for a small Philadelphia museum in the year that marks the 200th anniversary of Lincoln's birth.

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