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Pseudo delta sign on computed tomography of the head due to localized fat deposit in the superior sagittal sinus: case report.
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"Pseudo-delta sign" on computed tomography in an extremely acute stage of superior sagittal sinus thrombosis--a case report.
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Department of Internal Medicine, Tokyo Metropolitan Ebara Hospital, Japan.
A case of superior sagittal sinus (SSS) thrombosis with a "pseudo-delta sign" on computed tomography (CT) is reported. The so-called "empty delta sign," which usually appears following contrast enhancement, is reliable in the CT diagnosis of SSS thrombosis but may not appear, it is said, in the extremely acute stage. In this patient, however, the "empty delta sign" appeared with precontrast CT scans and disappeared with postcontrast CT scans, "pseudo-delta sign," in the extremely acute stage of SSS thrombosis.
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