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.
1 Doctors found a lump in her abdomen and feared she had cancer. 2  But an MRI scan revealed the mass was in fact, a child's skeleton. 3  Surgeon Dr Mohammad Yunus Shah, said: 'We believe this could be the longest case on record at 38 years'.  His team found a case of an ectopic pregnancy lasting 18 years in Belgium.