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NBME 23 Answers

nbme23/Block 2/Question#41

A 44-year-old woman, gravida 2, para 2, comes to ...

Cervical canal

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submitted by sugaplum(122),

FA 2019 pg 612 Endocervix-simple columnar epithelium

hopsalong  I use barrett's esophagus to remember these questions. Remember barrett's esophagus is squamous to columnar metaplasia -> this happens because of increased acid in the esophagus. What this means is that columnar cells are better for dealing with acid/internal fluids, and are a better cell type. Squamous is a better cell type for dealing with outside irritants. This means the vagina will be lined with squamous cells normally, and the cervical canal will be lined with columnar epithelium. +6  

Anki Card I made: Vagina = {{c1::Stratified squamous}} Cervix = {{c1::Stratified squamous --> simple columnar (endocervix)}} Uterus = {{c2::simple columnar}} Fallopian tubes = {{c2::simple columnar}} Ovaries = {{c3::simple cuboidal}}

 -1  upvote downvote
submitted by viz28(-1),

The squamo-columnar junction situated at the external os of the cervix is one site which is highly vulnerable to metaplasia or neoplastic transformation under adverse circumstances, such as chronic infection or trauma. Usually, squamous metaplasia where squamous cells replace the columnar cells of the endocervical canal, is observed. However, in less common situations, particularly after trauma, tubal metaplasia may develop, replacing endocervical nonciliated columnar epithelial cells by ′ciliated columnar′ cells, similar to those seen in fallopian tubes. Tubal metaplasia is mostly seen in the upper part of the endocervical canal near the internal os, but may also be found in the endocervical glands or the lower endocervical canal. http://medind.nic.in/jbb/t08/i1/jbbt08i1p33.htm

charcot_bouchard  But they are asking in healthy individual. I dont get why they add this ciliated part? +3  
thotcandy  @charcot_bouchard FA19 pg 612 says the only thing that's ciliated is Fallopian tubes... shit doesn't make sense yo +  

 -2  upvote downvote
submitted by tamey(0),

i chose endometrium(simple columnar epithelium) as i thought by her age she is still menstruating and the Shedded endometrium is found in the cervical region, why not!!!!

donttrustmyanswers  I think they key word here is "originates." The simple columnar epithelium starts in the cervical canal, and continues on throughout the uterus until you get to the ovaries. +