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    Cortez is offline Junior Member
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    A newborn baby is noted to have a left unilateral cleft lip.

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    A newborn baby is noted to have a left unilateral cleft lip. There are no abnormalities of the baby's palate. Which of the following developmental defects accounts for this occurrence?

    A. Failure of the left lateral palatine process to fuse with the median palatine process
    B. Failure of the left maxillary prominence to unite with the left medial nasal prominence
    C. Failure of the primary palate to fuse with the secondary palate
    D. Failure of the right and left medial nasal prominences to merge
    E. Failure of the right palatine process to fuse with the left palatine process

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    Asclepius1 is offline Ultimate Member 537 points
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    RE

    A. Failure of the left lateral palatine process to fuse with the median palatine process

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    Asclepius1 is offline Ultimate Member 537 points
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    My answer is B.

    B. Failure of the left maxillary prominence to unite with the left medial nasal prominence

    Visit my homepage for this http://www.cgmh.org.tw/intr/intr2/c3...duc/link03.htm

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    Re: A newborn baby is noted to have a left unilateral cleft lip.

    Quote Originally Posted by Cortez
    A newborn baby is noted to have a left unilateral cleft lip. There are no abnormalities of the baby's palate. Which of the following developmental defects accounts for this occurrence?

    A. Failure of the left lateral palatine process to fuse with the median palatine process
    B. Failure of the left maxillary prominence to unite with the left medial nasal prominence C. Failure of the primary palate to fuse with the secondary palate
    D. Failure of the right and left medial nasal prominences to merge
    E. Failure of the right palatine process to fuse with the left palatine process
    AUC, Class of 2007
    Internal Medicine (PGY-2)Hidden Content


  5. #5
    Roxanita is offline Senior Member
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    ...

    In the chapter of Embryology of Head and neck...

    Weeks 5 & 6: Maxillary processes grow medially & fuse with frontonasal process
    - Failure here >> cleft lip +/- primary (anterior) palate


    Cleft Lip occurs when the Maxillary Prominence fails to fuse with the Medial Nasal Prominence.

    Weeks 7 & 8: Tongue descent, migration & fusion of palatal shelves
    - Failure here>> cleft secondary (posterior) palate (Pierre-Robin, & other)






    Ref. Kaplan. Anatomy pg 272.

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