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NBME 21 Answers

nbme21/Block 2/Question#20

A 14-year-old girl is brought to the physician by ...

Trichotillomania

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 +2  upvote downvote
submitted by mattfoley_govtcheese(2),

The clues for trichotillomania were the death of her grandmother suddenly, since trichotillomania is often stress-induced. I also narrowed it down by it saying the hair was in different growth stages in the patchy areas, which makes sense if she’s plucking them out at different times.

Telogen effluvium is most common in middle-aged women, so she doesn’t fit the profile (but you’re right about it being caused by stress).

zpatel  What about telogen effluvium? psychological stress-related hair loss. +  




 +0  upvote downvote
submitted by egghead(0),

This is one of those questions I was never going to get. It's not in FA, I don't think I've seen it in class.

hungrybox  same :( +  
masonkingcobra  My issue was the stem said no skin damage (I would think pulling out your hair damages your scalp) [Turns out it does not](http://onlinelibrary.wiley.com/doi/full/10.1111/j.1529-8019.2008.00165.x) +  
gh889  FA 2019, pg 551 +3  
meningitis  Compulsively pulling out one’s own hair. Causes significant distress and persists despite attempts to stop. Presents with areas of thinning hair or baldness on any area of the body, most commonly the scalp. Incidence highest in childhood but spans all ages. Treatment: psychotherapy is first line; medications (eg, clomipramine) may be considered. +1  




 +0  upvote downvote
submitted by usmlelol(0),

here's a table showing difference bwtween alopecia vs trichotillomania https://www.semanticscholar.org/paper/Dermoscopic-clues-to-distinguish-trichotillomania-Abraham-Torres/db2ced7e6285879f59272387742d8d7eb1d5e664/figure/0