June 24, 2013: Hummingbird Sign in PSP
June 24, 2013
Hummingbird Sign in PSP
Progressive supranuclear palsy (PSP) is a neurodegenerative disorder characterized by dementia, pseudobulbar palsy, and, perhaps most distinctively, supranuclear ophthalmoplegia that mostly affects vertical gaze. The hummingbird sign is a specific radiologic finding visualized on mid-sagittal MRI sequences that has been reported in approximately 70% of cases of confirmed PSP. Atrophy of the rostral midbrain tegmentum produces a tapered appearance that forms the bill of the hummingbird with the remaining midbrain tegmentum, pons, and cerebellum making up the remainder of the hummingbird.
- Kato, N., Arai, K., and T. Hattori. Study of the rostral midbrain atrophy in progressive supranuclear palsy. J Neurol Sci 2003; 210: 57-60.
- Graber JI, Staudinger R. Teaching NeuroImages: "Penguin" or "hummingbird" sign and midbrain atrophy in progressive supranuclear palsy. Neurology 2009; 72: e81.
Submitted by: Sarah Nelson, MD
Disclosures: Dr. Nelson reports no disclosures.