Persistent buccopharyngeal membrane: a rare entity

A buccopharyngeal membrane is bilaminar with ectoderm on one side and endoderm on the other. It separates the primordial mouth from primitive pharynx and foregut, and around day 26 of embryonic development, breaks down as a result of stress caused by the growth of the primitive face in all three dimensions.1 Failure to rupture, results in the presence of a congenital intraoral buccopharyngeal membrane.

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