CEREBRAL VENOUS SINUS THROMBOSIS - A LATE SEQUEL OF INVASIVE FIBROUS THYROIDITIS

Riedel's invasive fibrous thyroiditis (IFT) is a rare disease of unkno wn etiology characterized by a dense fibrosis involving the thyroid gl and and its surrounding tissues. Clinically, patients present with a s tony hard goiter frequently associated with compressive symptoms. Invo lvement of the surrounding neck structures by IFT can lead to various clinical sequelae. We report the case of a 55-year-old woman with know n IFT who developed thrombosis in the right internal jugular vein that progressed to the right sigmoid, transverse, and superior sagittal si nuses. IFT could have predisposed to cerebral venous sinus thrombosis by causing venous stasis, vascular damage and possibly a hypercoagulab le state. To our knowledge, this is the first report of cerebral venou s sinus thrombosis that developed as a complication of IFT.