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Difference between revisions of "Gastrointestinal tract polyps"
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Gastrointestinal tract polyps (view source)
Revision as of 04:27, 9 August 2011
, 04:27, 9 August 2011→Typing: typing... note about "Pick's adenoma"
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(→Typing: typing... note about "Pick's adenoma") |
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===Typing=== | ===Typing=== | ||
Subclassified as:<ref name=pbod860>{{Ref PBoD|860}}</ref> | Subclassified as:<ref name=pbod860>{{Ref PBoD|860}}</ref> | ||
*Tubular (most common), tubular component >75%. | *''Tubular adenoma'' (most common), tubular component >75%. | ||
*Villous (least common ~= 1% of (traditional) adenomas), villous component >50%. | *''Villous adenoma'' (least common ~= 1% of (traditional) adenomas), villous component >50%. | ||
*Tubulovillous (uncommon ~5-10% of (traditional) adenomas), villous component >=25% & <=50%. | *''Tubulovillous adenoma'' (uncommon ~5-10% of (traditional) adenomas), villous component >=25% & <=50%. | ||
In other words: | In other words: | ||
*Tubular T/V >75% / <25%; Tubulovillous T/V <=75%-50% / 25%-<50%; Villous T/V <=50% / >50%. | *Tubular T/V >75% / <25%; Tubulovillous T/V <=75%-50% / 25%-<50%; Villous T/V <=50% / >50%. | ||
Note 1:<ref name=pbod860/> | |||
*Most villous adenomas are sessile, i.e. flat.<ref name=emed_va>[http://emedicine.medscape.com/article/170283-overview http://emedicine.medscape.com/article/170283-overview]</ref> | *Most villous adenomas are sessile, i.e. flat.<ref name=emed_va>[http://emedicine.medscape.com/article/170283-overview http://emedicine.medscape.com/article/170283-overview]</ref> | ||
*Tubular adenomas tend to be pedunculated, i.e. have a stalk. | *Tubular adenomas tend to be pedunculated, i.e. have a stalk. | ||
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*There are different definitions for tubular adenoma, tubulovillous adenoma, and villous adenomas.<ref name=emed_va/> | *There are different definitions for tubular adenoma, tubulovillous adenoma, and villous adenomas.<ref name=emed_va/> | ||
**Health Organization (WHO) criteria: villous adenomas >80% villous architecture. | **Health Organization (WHO) criteria: villous adenomas >80% villous architecture. | ||
Note 2: | |||
*''Tubular adenoma'' should not be confused with [[Sertoli cell nodule]] ([[AKA]] ''testicular tubular adenoma''). | |||
===Grading=== | ===Grading=== | ||