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NBME 20 Answers

nbme20/Block 4/Question#14

A 60-year-old man has a round, semitransparent ...

Basal cell carcinoma

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 +2  upvote downvote
submitted by usmleuser007(103),

All other types are either pigmented or have scales. -- process of elimination





 +2  upvote downvote
submitted by sympathetikey(289),

I believe the biopsy description of "small basophillic cells forming tumor islands" is describing the peripheral palisading that is classically seen in Basal cell carcinoma.





 +0  upvote downvote
submitted by step1soon(2),

Anything upper lip + above → basal cell carcinoma

Anything lower lip → Squamous cell carcinoma

FA 2019 -pg 473