Letter. "Corrosion" of tungsten spirals. A disturbing finding.
Very long-term (more than 30 months after treatment) skull plain films of patients treated with Mechanical Detachable Spirals "MDS" (tungsten) for intracranial aneurysm or dural fistula by venous approach, showed a decreasing level of radiopacity of the spirals suggesting that this material was resorbing with time. To date, all the aneurysms selectively treated with "MDS" which were followed-up by angiography more than 30 months after treatment (three cases) showed recanalization. The recanalization was proportional to degree of the "corrosion".
Weill
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A
Service de Neuroradiologie Interventionnelle, Fondation Ophtalmologique Adolphe de Rothschild; Paris, France - moretnri@fo-rothschild-fr.
Ducros
V
V
Cognard
C
C
Piotin
M
M
Moret
J
J