RT Journal Article
SR Electronic
T1 A Case of Horner Syndrome with Intermittent Mydriasis in a Patient with Hypoplasia of the Internal Carotid Artery
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1318
OP 1320
VO 27
IS 6
A1 Ibrahim, M.
A1 Branson, H.M.
A1 Buncic, J.R.
A1 Shroff, M.M.
YR 2006
UL http://www.ajnr.org/content/27/6/1318.abstract
AB SUMMARY: We report a rare case of hypoplasia of the right internal carotid artery (ICA) with ipsilateral congenital Horner syndrome. The etiology and pathogenesis of hypoplasia of the ICA is not well understood. Multiple types of collateral flow have been reported to develop to maintain blood supply to the ipsilateral cerebral hemisphere. Although collateral flow may allow these patients to remain asymptomatic, we postulate that the enlarged posterior communicating artery (PcomA) in our patient caused mass effect on the cisternal segment of cranial nerve III causing intermittent mydriasis apart from Horner syndrome.