Small and Large Bowel III Flashcards
What is the morphology of an inflammatory polyp?
Inflamed and regenerating mucosa that projects above the level of surrounding mucosa which is also ulcerated
What syndromes can cause inflammatory polyps? Where do they occur?
Caused by solitary rectal ulcer syndrome, ulcerative colitis, and crohn’s disease
Occurs anywhere in GI tract
What are the two ways juvenile (retention) polyps can generate?
Sporadically or as a result of polyposis syndrome
When retention polyps arise from polyposis syndrome, what is the individual at an increased risk of developing?
Adenocarcinoma
What is the microscopic morphology of a juvenile retention polyp? Gross morphology?
Microscopic: Multiple dilated, mucin filled crypts.
Gross: Usually rounded, smooth, unilobular with erythematous cap
What is the presentation of Peutz-Jeghers polyps?
In childhood with GI bleed and intussusception
What is mutated in Peutz-Jeghers syndrome?
Tumor suppressor gene STK11
What is the microscopic morphology of PJ polyps?
Hyperpigmentation
Smooth muscle arborizing pattern
What region is common to see lesions in PJS?
Oral
What is the clinical presentation of a hyperplastic polyp?
Single or multiple
Mostly in left colon
No worry of cancer progression
What is the microscopic morphology of hyperplastic polyps?
Serration of midportion of individual glands
If in the small bowel, where do adenomatous polyps most often present?
Duodenum
Where do adenomatous polyps mostly occur?
Colon
What are the two common morphologies for adenomatous polyps?
Sessile (attachment with flat base)
Pedunculated polyp
Where do sessile serrated adenomas most often present?
Right colon
