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.
Shams Ul haq Qari / Barcroft India. Surgery: Khalida Akhtar, here with Dr Malik Azad, arrived at the hospital complaining of discomfort and a severe abdominal pain. Doctors claim to have removed the world's biggest cyst - weighing a massive 3.46st. The giant cyst, which weighed more than a five-year-old child, was removed from an 18-year-old patient. Surgeons removed the growth from Khalida Akhtar's ovary after she arrived at the hospital in Kashmir, a disputed region between India and Pakistan, complaining of discomfort and a severe abdominal pain.