There are many medical reasons that can cause black stools that are tarry with a foul smell, but sometimes dark stools are caused by eating certain foods or taking iron supplements. However, black stools can also be a result of bleeding, and the darker color indicates that the blood could be coming from a point in the upper gastrointestinal tract.
Gertrude Levandowski survived a 96-hour procedure at a Chicago hospital to remove a giant ovarian cyst; the longest surgery. The second longest surgery ever was 40 hours long and that was to remove 6 limbs from a 8 limed baby in India. But the most common longest surgery is spinal cord surgery it is a 14 hour surgery.
Photos: Conjoined twins separated: New life, apart. The surgery was led by Dr. James Goodrich, considered the leading expert on what's known as craniopagus surgery. It marked the seventh and longest separation surgery performed by Goodrich -- and just the 59th craniopagus separation surgery in the world since 1952.