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Kaplan Qbank USMLE



Author10 Posts
  #1

i had a question in KQB about Barret's esophagus and the question was: what kind of metaplasia undergoes in esophageal epithelium in this condition? in other words what epythelium it resembles?
i had a problem answering this q because it had to be only one choice
please help to clarify


  #2

From squamous to Protective columnar epithelium of the intestine..Intestinal metaplasia


  #3

it is glandular metaplasia in distal esophagus.
Columnar epithelium with gastric-type mucous cells and intestine-type goblet cells.

http://www-medlib.med.utah.edu/WebPath/GIHTML/GI1...

  #4

the problem is that in Goljan pathology and another pathology - it is GASTRIC TYPE columnar cells and INTESTINE TYPE Goblet cells
i am confused

  #5

FA also says that it's GASTRIC type metaplasia, but in QB it was intestinalsad

  #6

it is glandular metaplasia.
all q banks have some bizarre questions

  #7

i read exactly the same explanation in Patho, but problem was - i had to make a choice between GASTRIC and INTESTNAL...hhhhhhhhhhhhhhhhhhhhmad

  #8

this question drives me NUTS!

  #9

Its called intestinal metaplasia. The conversion of the normally stratified squamous epithelium to a simple columnar epithelium with goblet cells of intestitinal origin. I have had to choose before on questions and went with intestinal. Check the robbins section on this, it explains it as intestinal metaplasia(to my recollection) and may help with your frustration.



  #10

Yes its intestinal metaplasia fomerly known as specialized columnar epithelial which is currently the definitive diagnostic point for Barret's.

REFERENCE: http://www.emedicine.com/med/topic210.htm

Finally, in 1976 Paull et al published a report on the histologic spectrum of BE in which they used manometric guidance for their biopsies. These patients had 1 or a combination of 3 types of columnar epithelium��"a gastric fundic-type, a junctional type, and a distinctive type of intestinal metaplasia the investigators called "specialized columnar epithelium." This specialized intestinal metaplasia (SIM), complete with goblet cells, has become the sine qua non for the diagnosis of BE. While the histologic lesion became clearly evident, the endoscopic definition of BE has continued to change over the past 25 years. Many people believed that the distal esophagus could contain a normal region of columnar mucosa. In addition, determining the exact location of the esophagogastric junction (EGJ) in patients with BE often is difficult. To avoid false-positive diagnoses, investigators selected arbitrary lengths of columnar-lined esophagus to establish a diagnosis for their studies. Eventually, community endoscopists embraced this practice and biopsy of this so-called normal distal columnar-lined esophagus was avoided. The last 10 years have brought convincing evidence that SIM, the hallmark histologic lesion of BE, predisposes to dysplasia and cancer regardless of the endoscopic location. Thus, the definition of BE currently is the finding of SIM anywhere within the tubular esophagus


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