Brain Tapeworms Cause Neurocysticercosis, A Creepily Common Parasitic Disease (PHOTO)

You've heard of disgusting, 20-foot-long tapeworms living inside peoples' intestines, but it turns out their larvae are even more horrific, and they could be eating holes in your brain right now, undetected.

Brain tapeworms, or Neurocysticercosis, are a parasitic disease of the nervous system, and Discover Magazine had an interesting (and vomit-inducing) expose on the problem this week.

Basically, brain tapeworms -- larvae that can attach themselves to the cranium in the form of large white cysts -- are the result of a wrong turn. The larvae are accustomed to traveling through a pig's bloodstream and attaching themselves to its muscles. But when a human eats undercooked pork, there's a chance he or she could be eating undercooked tapeworm larvae as well.