[Choroidal effusion syndrome after embolization of an indirect cavernous sinus fistula via the superior ophthalmic vein].

Embolization of a cavernous sinus fistula (SCF) via the superior ophthalmic vein (SOV) was reported to be an almost uncomplicated procedure, even after ligature of the vein at the end of the procedure. We report about a complication of this therapy. A 58-year-old female had a successful embolization of a right indirect cavernous sinus fistula via the SOV. At the end of the operation the SOV was ligated because of the danger of bleeding. Directly after surgery she experienced general worsening of the right eye with signs of venous congestion and marked effusion syndrome. The patient underwent total heparinization to achieve an opening of venous collaterals. Under local therapy with atropine 1% eye drops a decrease of the intraocular pressure was observed. The effusion syndrome was completely resolved within 1 month. If embolization of a cavernous sinus fistula is performed via the SOV, the ligature of the vein at the end of the procedure leads to thrombosis, which can reduce the venous stream from the eye and orbit. A secondary effusion syndrome with ocular hypertension because of a ciliolenticular block situation is possible and requires appropriate therapy. It is not possible to assess the capacity and time of opening of the venous collateral system before surgery. Therefore a transient outflow disturbance should be considered.