====== NEURORADIOLOGY ====== * molar tooth sign (MRI brain) = Joubert syndrome * starry sky sign(CT) = appearance that may be seen with neurocysticercosis * Boomerang Sign-hyperintense signal in the splenium of the corpus callosum accompanying stroke; also an * MRI sign in peroneus brevis split syndrome * Figure of eight (MRI) = Appearance of brain in lissencephaly * Boxcar ventricles = appearance of frontal horns that may be seen in huntington's disease * salt and pepper appearance(MRI) = paraganglioma * hot cross bun = multisystem atrophy * humming bird sign = progressive supranuclear palsy * Eye of tiger Sign = low signal intensity circumscribing the globus pallidus in patients with hallervorden - spatz disease