Hyperdense basilar cisterns

Common: Intrathecal contrast; Subarachnoid hemorrhage
Uncommon: Bromism; Coccidioidomycosis; Cryptococcosis; Epidermoid; Lymphoma; Melanoma; Meningeal calcification; Meningioma; Polycythemia; Postischemic meningeal hypervascularity; Sarcoidosis; Tuberculosis

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