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Progressive supranuclear palsy (PSP), previously known as Steele-Richardson-Olszweski syndrome, is an atypical parkinsonian syndrome with a prevalence of ~5/100 000. It is an important differential diagnosis of more common idiopathic Parkinson's disease (iPD), where clinical differentiation is not straightforward and characteristic neuroimaging often yields a diagnostic clue. We describe a case of 75-year-old man with a history of slowness of activities and recurrent fall while walking, which was insidious in onset and gradually progressive for last 2 years. There was no history of tremor, stooping postures, urinary incontinence or hallucination. On examination supranuclear vertical gaze palsy with slow horizontal saccades, axial rigidity and bradykinesia were present. He had a slow gait with lack of associated movements and tendency to fall backwards. He had positive 'dirty tie sign' while eating. The patient was diagnosed as a probable case of PSP and MRI of the brain was done. Mid-sagittal T2-weighted MRI of the brain revealed characteristic selective atrophy of midbrain tegmentum (mesencephalon), with relatively preserved pons, giving an appearance of the head and body, respectively, of a hummingbird ( figure 1 ). This is known as 'The Hummingbird sign' or 'The King Penguin sign'. 1 The axial T2 MRI image shows a reduction in the anterior-posterior diameter of midbrain with thinning of cerebral peduncle giving appearance of 'morning glory sign' or the...