Radionuclide scan showing no intracranial blood flow. The<unk>  is manifest. The<unk>  refers to increased perfusion in the nasal region on nuclear medicine cerebral perfusion studies in the setting of brain death. The absent or reduced flow in the internal carotid arteries is thought to lead to increased flow within the external carotid arteries and subsequent increased perfusion in the nasal region.
Hot nose sign
Portsmouth sign
Cupola sign
Boas' sign
Moniz sign
Halo sign
Sulcus sign
Claybrook sign