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Solitary median maxillary central incisor syndrome
A single maxillary central incisor positioned in the midline with morphological symmetry of the crown and bordered by lateral incisors. [from HPO]
Pyriform aperture stenosis
Narrowing of the anterior nasal aperture (piriform or pyriform aperture), which is a pear-shaped opening in the skull that forms the bony inlet of the nose. [from HPO]
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