Pharyngeal arches — MCQs
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A 2850-g (6-lb 5-oz) newborn is delivered at term to a 19-year-old primigravid woman via normal spontaneous vaginal delivery. The mother has had no prenatal care. Examination of the newborn in the delivery room shows malformed external ears, facial nerve palsy, and absence of the stapes bone on audiological testing. This patient's condition is most likely caused by abnormal development of the structure that also gives rise to which of the following?
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First pharyngeal arch derivatives
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Second pharyngeal arch derivatives
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Third pharyngeal arch derivatives
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Fourth and sixth pharyngeal arch derivatives
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Pharyngeal pouches
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Pharyngeal clefts
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Pharyngeal membrane derivatives
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Neural crest contribution to pharyngeal arches
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Congenital anomalies of pharyngeal arch derivatives
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Clinical correlations of pharyngeal development
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