For tumors affecting the bottom half of the bile duct, the cancer is removed with a Whipple operation. For tumors in the top half of the bile duct, surgical treatment often requires removal of the tumor together with a liver resection (removal) in an attempt to provide a surgical cure.
How long for plastic water bottle to decompose? An average time for a plastic bottle to biodegrade fully is approximately 450-1000 years. However, there are many different kinds of plastic in the world, most commonly the haâ¦rd and reusable ones, which take a longer time, and the soft and non-reusable ones, which take a shorter time.
Newspaper: 2 to 4 weeks, can take longer in landfills due to lack of microbes; will decompose much faster when wet Sources: Pocket Guide to Marine Debris from The Ocean Conservancy (2004), How Long Does It Take Waste Materials to Decompose and âGarbage In, Garbage Out,â Audubon magazine, Sept/Oct 1998.