12 August 2026
: Case report 
Syndrome of Inappropriate Antidiuresis and Symptomatic Hyponatremia After Onyx Embolization of a Carotid-Cavernous Fistula: A Case Report
Unusual or unexpected effect of treatment, Rare coexistence of disease or pathology
Amir Nikouei ABCDEF 1, Blake Giarola ACD 1, Shuo Xi CDF 2, Karl Ng
AD 2*
DOI: 10.12659/AJCR.953613
Am J Case Rep 2026; 27:e953613
Figure 3 Filling of the left cavernous sinus after right internal carotid artery (RICA) injection on the AP view. Less intense filling is also observed on the AP view after right external carotid artery (RECA) injection. White arrow: early filling of the right cavernous sinus on ipsilateral RICA injection; black arrow: early filling of the left cavernous sinus on RICA injection; star: fistula point. Additional abbreviations: RMCA, right middle cerebral artery; ACAs, anterior cerebral arteries; RSTA, right superficial temporal artery; RIMAX, right internal maxillary artery.