teratology
amillikan | December 19, 2008When doctors opened the skull of a 3-day old from Colorado Springs to remove what they thought was a brain tumor, they were surprised to find a collection of organized body parts—including two small feet, a partial hand and intestines. "This was the most well-organized 'tumor' I've ever heard of," said ScienceBlogger PZ Myers, who discusses similar cases of developmental abnormalities on his blog, Pharyngula.