Pathology: Small Bowel Flashcards
what are the two possible causes of ischaemia of the small bowel?
mesenteric artery occlusion
non occlusive perfusion insufficiency
what two things can cause mesenteric artery occlusion?
mesenteric artery atherosclerosis
thromboembolism from the heart
name four things that can cause non occlusive perfusion insufficiency
shock
strangulation of the bowel
drugs
hyperviscosity
is bowel ischaemia usually acute or chronic?
acute
what is the most metabolically active part of the bowel wall, and what does this mean in terms of ischaemia?
the mucosa
means it is the most sensitive to the effects of hypoxia
when does most tissue damage occur in non-occlusive ischaemia?
after reperfusion
name the three types of intestinal infarct, from lowest to highest degree
mucosal
mural
transmural
what is meckel’s diverticulum the result of?
incomplete regression of the vitello intestinal duct
what might a meckel’s diverticulum contain?
heterotopic gastric mucosa
name three possible complications of meckel’s diverticulum
bleeding
perforation
diverticulitis
list the primary tumours that can occur in the small bowel
lymphoma
carcinoid tumour
carcinomas
which is more common, a primary or a secondary tumour in the small bowel?
secondary
what type of lymphomas are found in the small intestines?
non-hodgkins
how is lymphoma of the small bowel treated?
surgery and chemotherapy
what is the most common site for a carcinoid tumour?
the appendix
