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Normal flow signal of the pterygoid plexus on 3T MRA in patients without DAVF of the cavernous sinus.
AJNR Am J Neuroradiol. 2013 Jun-Jul; 34(6):1232-6.AA

Abstract

BACKGROUND AND PURPOSE

Cavernous sinuses and draining dural sinuses or veins are often visualized on 3D TOF MRA images in patients with dural arteriovenous fistulas involving the CS. Flow signals may be seen in the jugular vein and dural sinuses at the skull base on MRA images in healthy participants, however, because of reverse flow. Our purpose was to investigate the prevalence of flow signals in the pterygoid plexus and CS on 3T MRA images in a cohort of participants without DAVFs.

MATERIALS AND METHODS

Two radiologists evaluated the flow signals of the PP and CS on 3T MRA images obtained from 406 consecutive participants by using a 5-point scale. In addition, the findings on 3T MRA images were compared with those on digital subtraction angiography images in an additional 171 participants who underwent both examinations.

RESULTS

The radiologists identified 110 participants (27.1%; 108 left, 10 right, 8 bilateral) with evidence of flow signals in the PP alone (n = 67) or in both the PP and CS (n = 43). Flow signals were significantly more common in the left PP than in the right PP. In 171 patients who underwent both MRA and DSA, the MRA images showed flow signals in the PP with or without CS in 60 patients; no DAVFs were identified on DSA in any of these patients.

CONCLUSIONS

Flow signals are frequently seen in the left PP on 3T MRA images in healthy participants. This finding may be the result of flow reversal and should not be considered to indicate occult DAVF.

Authors+Show Affiliations

Department of Radiology, University of Occupational and Environmental Health, School of Medicine, Fukuoka, Japan. sapient@med.uoeh-u.ac.jpNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

23275595

Citation

Watanabe, K, et al. "Normal Flow Signal of the Pterygoid Plexus On 3T MRA in Patients Without DAVF of the Cavernous Sinus." AJNR. American Journal of Neuroradiology, vol. 34, no. 6, 2013, pp. 1232-6.
Watanabe K, Kakeda S, Watanabe R, et al. Normal flow signal of the pterygoid plexus on 3T MRA in patients without DAVF of the cavernous sinus. AJNR Am J Neuroradiol. 2013;34(6):1232-6.
Watanabe, K., Kakeda, S., Watanabe, R., Ohnari, N., & Korogi, Y. (2013). Normal flow signal of the pterygoid plexus on 3T MRA in patients without DAVF of the cavernous sinus. AJNR. American Journal of Neuroradiology, 34(6), 1232-6. https://doi.org/10.3174/ajnr.A3377
Watanabe K, et al. Normal Flow Signal of the Pterygoid Plexus On 3T MRA in Patients Without DAVF of the Cavernous Sinus. AJNR Am J Neuroradiol. 2013 Jun-Jul;34(6):1232-6. PubMed PMID: 23275595.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Normal flow signal of the pterygoid plexus on 3T MRA in patients without DAVF of the cavernous sinus. AU - Watanabe,K, AU - Kakeda,S, AU - Watanabe,R, AU - Ohnari,N, AU - Korogi,Y, Y1 - 2012/12/28/ PY - 2013/1/1/entrez PY - 2013/1/1/pubmed PY - 2013/11/6/medline SP - 1232 EP - 6 JF - AJNR. American journal of neuroradiology JO - AJNR Am J Neuroradiol VL - 34 IS - 6 N2 - BACKGROUND AND PURPOSE: Cavernous sinuses and draining dural sinuses or veins are often visualized on 3D TOF MRA images in patients with dural arteriovenous fistulas involving the CS. Flow signals may be seen in the jugular vein and dural sinuses at the skull base on MRA images in healthy participants, however, because of reverse flow. Our purpose was to investigate the prevalence of flow signals in the pterygoid plexus and CS on 3T MRA images in a cohort of participants without DAVFs. MATERIALS AND METHODS: Two radiologists evaluated the flow signals of the PP and CS on 3T MRA images obtained from 406 consecutive participants by using a 5-point scale. In addition, the findings on 3T MRA images were compared with those on digital subtraction angiography images in an additional 171 participants who underwent both examinations. RESULTS: The radiologists identified 110 participants (27.1%; 108 left, 10 right, 8 bilateral) with evidence of flow signals in the PP alone (n = 67) or in both the PP and CS (n = 43). Flow signals were significantly more common in the left PP than in the right PP. In 171 patients who underwent both MRA and DSA, the MRA images showed flow signals in the PP with or without CS in 60 patients; no DAVFs were identified on DSA in any of these patients. CONCLUSIONS: Flow signals are frequently seen in the left PP on 3T MRA images in healthy participants. This finding may be the result of flow reversal and should not be considered to indicate occult DAVF. SN - 1936-959X UR - https://www.unboundmedicine.com/medline/citation/23275595/Normal_flow_signal_of_the_pterygoid_plexus_on_3T_MRA_in_patients_without_DAVF_of_the_cavernous_sinus_ L2 - http://www.ajnr.org/cgi/pmidlookup?view=long&pmid=23275595 DB - PRIME DP - Unbound Medicine ER -