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NBME 23 Answers
A 21-year-old man is brought to the emergency ...
sorry my bad this was the wrong question i responded to but i still got this one (ED one) and the gynecomastia one wrong
i think it's liver for this one because they say it has regenerative potential and because even though the small intestine has regenerative potential, it can apparently fibrose? i have no idea, i put small bowel
@bigbootycorgi : I put small intestine too. From what I've searched after, it says that liver fibrosis reversible -> no evidence of fibrous scarring
Just to add to that, a cirrhotic liver is a small shrunken liver so you wont be able to find hepatomegaly anyways. The other signs are the stigmata of Liver disease
Small intestine has smooth muscle in the walls which will fibrose on injury
So cutting through the intestine will damage the crypts of Lieberkühn which contain stem cells that replace enterocytes/goblet cells (Faid). This lack of regenerative ability will have platelets and inflammatory cells to be recruited in order to mediate healing (which end result is fibrosis)
The intestinal wall lacking crypts of Lieberkühn acts pretty much like stable cells (e.g: cardiomyocytes) which cannot be regenerated and so fibrosis ensues (e.g: Scar is always end product after MI)
Correction: I meant Permanent cells instead of Stable cells.
The hepatocytes in this case will act as a stable cells which will exit G0 phase and proliferate in response to injury.