non-cancer SI Flashcards
Describe the common structural anomalies of the bowel (Stenosis \ atresia, duplication, Meckel, Omphalocele, Malrotation and Hirschsprung disease) Compare and contrast the causes of diarrhea (secretory, osmotic, exudative, dysentery, and malabsorption) Describe the pathogenesis and pathologic findings (including lab tests) of pseudomembranous colitis Describe the clinicopathologic findings in gluten sensistive enteropathy as well as possible outcomes for refractory disease Compare and contra
major causes of intestinal obstruction
hernia, adhesion, volvulus (twisting) and intusseption
congenital defect in colonic innervation
hirschsprung disease
neonates with failure to pass meconium followed by pbsreuctive constipation
hirschsprung disease
pathenogenisis of hirschsprung disease
failure of neural crest cells to migrate from cecum to rectum
genetic mutation in hirschsprung disease
loss of function mutation in TK RET
common sites of herniation
weakness or defect in abdominal wall, inginial and femoral canal,unbilicus or sites of surgical scarring
infarction limited to muscularis mucosa
mucosal infarction
infarction of mucosa and submucosa
mural infarction
infarction of all three layers of bawel wall
transmural infarction
transmural infarction caused by
acute vascular obstruction
can cause acute bowel vascular pbstruction
atherosclerosis
aneurysm
hypercoagulable states
emobolization of cardiac vegitation
can cause intestinal hypoperfusion
cardiac failure
dehydration
vasoconstrictive drugs
parts of bowel most sucseptible to ischemia
segments at the end of their respective arterial supplies (watershed zones)
morphologic signature of ischemic bowel disease
eurface epithelial atryphy with normal or hyperproliferative crypts
type of ischemic bowel disease that is segmental and patchy
mucosal and mural
blood tinged mucous or blood in intestinal luman
transmural infarction
sudden severe abdominal pain snd tenderness with n/v, bloddy diarreha and grossly melontic stool.
ischemic bowel disease
rigid abdomominal wall and diminished bowel sounds
ischemic bowel disease
ischemic bowel disease tends to be associated with
cardiac or vascular disease in older people
malformed submucosal and mucosal blood vessels
angiodysplasia
most often location of angiodysplasia
cecum or right colon
pain and rectal bleeding
hemorroids
bad cause of hemorroids
portal hypertension
isontonic stool, perisiting during fasting
secretory diarrhea
concentrated osmolar stool that abates with fasting
osmotic diarrhea
typeof diahhrea in lactose intolerance
osmotic diarrhea
steatorrhea and releved by fasting. flatus, abdominal pain and weight loss
malabsropative diarrhea