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chapter 20, colorectal cancer
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primarily occurs in adults 55 or older
occurs in recto-sigmoid area
coloreactal cancer
what accounts for 95% of the malignant tumors of the intestine
adenocarcinomas
what is the patho of colon cancer
polyps develop into malignant tumors
mass that protrudes into intestinal lumen
polyp
what are the genetic etiologys of colorectal cancer
familiar multiple polyp
s -hereditary=lots of polyps
hereditary nonpolyops colorectal cancer(HNPCC
)-cancer comes from mucosa, not polyps
chronic ulcerative coliti
s-chronic colon inflammation
Crohn's disease
what are some etiologies for colorectal cancer other than genetic factors
diet-high fat, red meat, high refined foods
during digestion what is broken down to potential carcinogens
fats
what are the early signa of colorectal cancer
none
bowel habits change
bleeding
anemia
bleeding that occurs on the surface, usually from a lesion in the rectum
Frank blood
hidden blood
occult blood
old blood, tarry black stools
melena
what are the later signs of colorectal cancer
indigestion
pain w/tenderness lower abdomen
pallor
ascities
cachexia-wasting away
lymphadenopathy
what are the diagnostic test for coloreactal cancer
digital rectal exam-"napkin ring lesion"
hemoccult test
proctoscopy or colonoscopy
barrium enema
CT
blood test-CEA(carcinoembryonic antigen)
what are the 2 types of hemoccult test
guaiac-feces on test strip
IFOB(immunochemical fecal occult blood)-specific for humans
what do most adenocarcinomas release to help diagnosis colorectal cancer? what is the drawback
CEA(carcinoembryonic antigen)
patients with ulcerative colitis also have CEA
what is the most important way to combat colorectal cancer
early detection
what are the complications of colorectal cancer
intestine lumen obstruction
metastasis
via lymph nodes and blood to
liver
what is the treatment for colorectal cancer
surgery
excision of involved area
colostomy-bag for fecal matter
chemo & radiation
what is the prognosis for colorectal cancer
depends
early detection is key
Author
tville01
ID
155067
Card Set
chapter 20, colorectal cancer
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chapter 20, colorectal cancer
Updated
5/21/2012, 5:47:58 PM
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