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Fig. 3. —14-year-old boy with recurrent epistaxis. Unenhanced coronal CT image shows prominent palatovaginal canal (solid black arrow) on right, of approximately same size as ipsilateral vidian canal (white arrow), which measures 1.6 mm in diameter. These findings influenced treatment planning, and embolization was considered. Patient was lost to follow-up before angiogram was obtained. Leftsided palatovaginal canal is seen as semicanal (open black arrow). This case represents typical oblique alignment of three posterior pterygopalatine fossa foramina, with round foramen of sphenoid bone (arrowhead) as most superior and lateral one.