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NBME 21 Answers

nbme21/Block 3/Question#25 (42.0 difficulty score)
A 32-year-old woman comes to the physician ...
Dysplastic nevi🔍
tags:

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 +13 
submitted by hungrybox(831),
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usmleuser007  correction ~ BCC affects the lower lip more than the upper +1  
sympathetikey  Pathoma says upper lip, good sir +25  
hungrybox  Yeah basal cell carcinoma actually affects the upper lip. Counterintuitive because it's "basal" which seems to go along with the lower lip. Here's another source (this website is fucking gold btw): https://step1.medbullets.com/oncology/121593/basal-cell-carcinoma-of-the-skin +4  
pg32  Can anyone explain how we can rule out C or E purely based on the question stem? If we read into the question that we are looking for something related to melanoma, then I get why we can rule out C and E. However, the question simply asks which lesion appears on both sun-exposed and nonsun-exposed areas of the patient's skin. I would say that C, D and E can all occur in that distribution pattern. +1  
paperbackwriter  @pg32 because it specifies "this patient's skin," and the only ones he is more likely to get than the average person because of his family history are dysplastic nevi +2  
teepot123  fa 19 pg 473 +  
rockodude  just remember BS. basal cell upper, squamous cell lower +  



 +7 
submitted by codyluvr95(6),
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 +1 
submitted by soph(48),
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