%0 Journal Article %A H Tanaka %A U Patel %A D A Shrier %A J U Coniglio %T Pseudoaneurysm of the petrous internal carotid artery after skull base infection and prevertebral abscess drainage. %D 1998 %J American Journal of Neuroradiology %P 502-504 %V 19 %N 3 %X A 37-year-old woman with a skull base infection sustained massive oropharyngeal bleeding after incisional nasopharyngeal biopsy and drainage of a prevertebral abscess. A pseudoaneurysm originating at the petrous portion of the internal carotid artery was initially misinterpreted on MR images as typical postoperative change within a resolving abscess cavity. Follow-up MR imaging and conventional angiography ultimately disclosed the pseudoaneurysm. %U https://www.ajnr.org/content/ajnr/19/3/502.full.pdf