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Cleft palate and lip development? Help!

Discussion in 'Step I' started by audramill, Jun 18, 2008.

  1. audramill

    audramill miss akay 10+ Year Member

    Jun 17, 2005
    San Francisco
    I'm having a tough time getting my head around the development. I've tried Youtube searches, Kaplan lectures and USMLEworld explanations of my incorrect answers.

    Does anyone have a brilliant resource to explain what's going on during this developmental period? Maybe something animated?

    Primary, secondary, maxillary.... eek!! :laugh:
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  3. Nodelphi

    Nodelphi Member 7+ Year Member

    Feb 20, 2006
    The way I understand it is Cleft lip = problem with fusion of nasal processes.
    Cleft Palate = failure of fusion of palatine processes/plates.
  4. osli

    osli Senior Member 5+ Year Member

    Oct 13, 2005
    Yep, that's pretty much it. If it's a "typical" cleft lip under a nostril, it's a nasal to maxillary fusion defect. If it's a "big mouth" (macrostomia) defect, it's a maxillary to mandibular fusion defect. There are others that are midline and produce medial clefts, widened nasal bridges, or even holoprosencephaly (cyclops) but those are very unlikely to be asked about.
  5. tfom08

    tfom08 2+ Year Member

    May 2, 2008
    My problem is I have seen different terminology for the parts in all of the sources I have looked at. The only one I am sure of is that cleft lip is failure of the median nasal processes to fuse with the the maxillary processes. As for cleft palate, I guess the other one's the other one. Palatine shelfs and something.

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