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Comments ...

 +1  (nbme24#6)

all the other vessels, either have collateral supplies or they supply to organs with multiple sources of blood supply

IMA and SMA both have collaterals with each other (marginal arteries and meandering arteries), so incase there is involvement of one of the arteries the blood supply from other can prevent ischemia.

but if both SMA and IMA are involved it would result in ischemia and symptoms described in the question.


 +0  (nbme24#13)

option B) (the correct option as per nbme) :the patient has a mini mental state of 23/30, so that should mean that she isn't capable of making her own decisions! so whats the point in talking to her privately without her daughter?

option A) is wrong because you cant just hide the diagnosis from the patient and share it with the family

option C & D)you cannot disregard the test or repeat the test as both the test are positive, RPR is a screening test with less specificity but microhemagglutination is a highly specific test so she definetly has syphillis!

option E) doesnt make sense because why would you do lumbar puncture for syphillis?!

i think they forgot to give an option F) just freakin treat her for syphillis!!!





Subcomments ...

Why is it not ovarian follicle cells? I thought the female analog of Sertoli and Leydig is theca/granulosa cells.

colonelred_  Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen. +3  
brethren_md  Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen +2  
sympathetikey  Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen +2  
s1q3t3  Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen +2  
masonkingcobra  Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen +1  
mcl  Wait, but did anyone mention that females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen??? +11  
mcl  But seriously though, pathology outlines says sertoli-leydig tumor "may be suspected clinically in a young patient presenting with a combination of virilization, elevated testosterone levels and ovarian / pelvic mass on imaging studies." As for follicle cell tumors, granulosa cell tumors usually occur in adults and would cause elevated levels of estrogens. Theca cell tumor would also primarily produce estrogens. Putting the links at the end since idk if they're gonna turn out right lol Link pathology outlines for sertoli leydig granulosa cell tumor theca cell tumor +6  
bigjimbo  LOL +  
fallenistand  Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen. +3  
medpsychosis  So after doing some intense research, UPtoDate, PubMed, an intense literature review on the topic I have come to the final conclusion that...... ...... ...... ...... Wait for it.... ..... ..... Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen. +4  
charcot_bouchard  Hello, i just want to add that Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen +1  
giggidy  Hold up, so I'm confused - I read all the posts above but I still am unsure - are sertoli-leydig cells notorious for producing androgen? +1  
subclaviansteele  Hold the phone.....Females can get sertoli leydig cell tumors which are notorious for producing androgen? TIL TL;DR - Females can get sertoli leydig cell tumors = high androgens +  
cinnapie  I just found a recent study on PubMed saying "Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen" +1  
youssefa  Hahahahaha ya'll just bored +2  
water  Bored? you wouldn't think so if you knew that females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen +1  
nbmehelp  I dont get it +  
redvelvet  how don't you get it that females can get Sertoli Leydig cell tumors, which are notorious for producing lots of androgen? +  
drmomo  what if this means..... females can get Sertoli Leydig cell tumors, which are notorious for producing lots of androgen +  
sunshinesweetheart  hahahaha this made my day #futurephysicians #lowkeyidiots +  
sunshinesweetheart  @medstruggle look up placental aromatase deficiency (p. 625 FA 2019), it would have a different presentation +  
deathbystep1  i am sure i would ace STEP 1 if i only knew that females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen +1  
noplanb  Wait... I might actually never forget this now lol +  
drmohandes  Females can get sertoli-leydig cell tumors, which are notorious for producing lots of androgen. +1  
lilmonkey  Don't forget that females can get Sertoli-Leydig cell tumors, which are notorious for producing lots of androgens! You're welcome! +  


submitted by m-ice(135),

Competitive inhibitors increase the Km of the substrate. The Km represents how easily a substrate can bind the active site, with a lower Km representing easy binding, and a higher Km meaning more difficult. If you add a competitive inhibitor, like ethanol in this case, it makes it more difficult for the methanol to bind the active site, because it must compete with the ethanol.

deathbystep1  but how is ethanol a "inhibitor" of alcohol dehydrogenase? isnt the concept that both ethanol and methanol compete for the same binding site of alcohol dehydrogenase and hence ethanol displaces methanol preventing its metabolism? if ethanol were to be a inhibitor it would have to shut off the enzyme, which is does not. +  
krewfoo99  @deathbystep1 Competitive inhibitor simply means increasing concentration of a particular substrate will allow more binding of the substrate to the enzyme. Thus the substrate with the higher concentration will competitive inhibit the other substrate by binding to the enzyme. It dosent necessarily shut off the enzyme +1