Fig. 2

Precontrast magnetic resonance imaging of the brain. a An axial T2-weighted image and b a sagittal T2-weighed image showing a cystic mass at the choana and nasopharynx causing airway obstruction (arrows). Note a 4-mm fistula-like structure in the sphenoid bone (arrowhead). There was no discernible communication with intracranial structures. Further, a mega cisterna magna was incidentally detected (curved arrow)