Note: The age demographic for primary sclerosing cholangitis (PSC) is predominantly male unless in the absence of IBD (in which case it is female). So disregard the bullet point under PSC towards the end of the video regarding the gender demographic. I try to clarify this in the video but wanted to make a permanent mention of the differences between PBC and PSC. PBC classically occurs in middle aged females on USMLE exams, which is something that is very important to know. The downloadable slides on the website will be updated so this will hopefully be less confusing when reviewing in the future. Additional point: When referring to the highly tested anatomical GI landmarks (specifically the rectosigmoid junction), the important point was to differentiate which pathology occurs at each landmark. It was not to imply that acute colonic ischemia at watershed distributions was another form of obstruction; it will usually present in the setting of severe hypovolemia/hemorrhage/ischemia. Thinking of the GI tract as a system that has separate entities occurring depending on the anatomical features and remembering these presentations is what's important. So just remember these landmarks as important sites where they like to test very specific pathology but don't think that each of them has to present as an obstruction.
Thanks a bunch for this lecture Dr. Tim. It has helped me understand lots of GI pathologies, better ways to answer test questions and more. Please kindly make another GI video addressing other HY USMLE materials.
![Twenty One Pilots - The Line (from Arcane Season 2) [Official Audio]](http://i.ytimg.com/vi/XCz7WUotXs8/mqdefault.jpg)
Note: The age demographic for primary sclerosing cholangitis (PSC) is predominantly male unless in the absence of IBD (in which case it is female). So disregard the bullet point under PSC towards the end of the video regarding the gender demographic. I try to clarify this in the video but wanted to make a permanent mention of the differences between PBC and PSC. PBC classically occurs in middle aged females on USMLE exams, which is something that is very important to know. The downloadable slides on the website will be updated so this will hopefully be less confusing when reviewing in the future.
Additional point: When referring to the highly tested anatomical GI landmarks (specifically the rectosigmoid junction), the important point was to differentiate which pathology occurs at each landmark. It was not to imply that acute colonic ischemia at watershed distributions was another form of obstruction; it will usually present in the setting of severe hypovolemia/hemorrhage/ischemia. Thinking of the GI tract as a system that has separate entities occurring depending on the anatomical features and remembering these presentations is what's important. So just remember these landmarks as important sites where they like to test very specific pathology but don't think that each of them has to present as an obstruction.
Another amazing video from Dr. Tim!
Thanks a bunch for this lecture Dr. Tim. It has helped me understand lots of GI pathologies, better ways to answer test questions and more. Please kindly make another GI video addressing other HY USMLE materials.
Yessirrrr new review time
Thank you again, @Doctor Tim! You're videos are beyond helpful!!!! Waiting for one on pediatric immunodeficiencies (fingers crossed).
Thank you Dr TIM
Thats a great suggestion, definitely one I had planned! Stay tuned in the future!
Great video! Would love a part 2 ❤
Very instructive and logical explanation thank you very much
Thank you so much Dr. Tim! The videos are spot on and very useful. You are very smart! Can you do more on gastro?
Great suggestion, I can definitely try to prioritize more GI in the future!
Please do for all the systems. The vedios are helping me with the USMLE step 1 prep
Thank you! well done
Thanks
Amazing content tysm