Upper GI bleed: Tail of pancreas cancers rarely cause pain. Rather as they grow they obstruct the venous output from the spleen from blood feeding the spleen via the splenic artery. The spleen output is shifted to the vasa brevia of the greater curvature of the stomach where varices are formed and GI bleeding follows. Spread to other sites also noted early ie. liver.
Answered 3/12/2020
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