PMC9443575_01
Oronasal fistula in the anterior region of hard palate on the left.
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fig1
Coronal and axial CT scan sections showing large rhinolith in the left nasal fossa.
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fig2
Surgical piece after fragmentation of rhinolith for its removal.
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fig3
It was necessary to fragment the rhinolith so that it could be removed, owing to its extremely irregular shape and extension (Figure 3).