Things aren’t always what they seem – especially in the medical realm. That's precisely what surgeons in Japan discovered when performing an emergency appendectomy. Brain tissue ... in ovaries?!  
Acute appendicitis has been the most common surgical emergency causing ER visits since records have been kept. It has been crucial to rapidly differentiate acute AP pain from pain unrelated to an acute, possibly emergency condition. Until now, that is: antibiotics and observation may be an option.