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NBME 24 Answers

nbme24/Block 3/Question#45

A 59-year-old woman has a 10-year history of ...

Neural crest cells

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 +6  upvote downvote
submitted by neonem(278),

Cerebellopontine angle mass = Vestibular schwannoma (AKA acoustic neuroma). Derived from Schwann cells, which are of neural crest origin.

yotsubato  Ugh. Of course they dont put schwann cells as a choice. So I pick oligodendrocytes like a dumbass +12  
subclaviansteele  Same^ +  
madojo  Schwann cells = PNS Oligodendrocytes = CNS +  

 +0  upvote downvote
submitted by madojo(11),

Going over other choices (FA 19 514): Oligodendrocytes are part of the CNS so a tumor there would be an oligodendroglioma which is relatively rare, and in frontal lobes. On histology you would see fried egg appearance with chicken wire capillaries. Glioblast tumor would be a glioblastoma multiforme which is common and has a 1 year survival, its the one with the butterfly glioma crossing the corpus callosum.