Progressive supranuclear palsy: MRI and pathological findings

Area of Science:

• Neurology
• Radiology
• Pathology

Background:

• Progressive supranuclear palsy (PSP) is a neurodegenerative disease.
• Distinguishing PSP from Parkinson's disease (PD) and striatonigral degeneration (SND) can be challenging.
• Neuroimaging plays a crucial role in diagnosing PSP.

Purpose of the Study:

• To investigate brain atrophy and MRI signal intensity changes in PSP patients.
• To correlate imaging findings with pathological features.
• To identify characteristic imaging biomarkers for PSP.

Main Methods:

• Review of MRI scans and brain specimens from patients with PSP, PD, and SND.
• Analysis of sagittal T1-weighted and T2-weighted MRI sequences.
• Correlation of imaging findings with histopathological examination.

Main Results:

• Four PSP patients exhibited reduced anteroposterior midbrain diameter on T1-weighted MRI.
• T2-weighted MRI revealed diffuse high-signal lesions in the midbrain and pons tegmentum in PSP patients, absent in PD and SND.
• One PSP patient showed pontine signal abnormality without midbrain atrophy, highlighting varied presentations.

Conclusions:

• Midbrain atrophy and diffuse T2 high-signal lesions in the brainstem tegmentum are characteristic imaging features of PSP.
• MRI findings are consistent with pathological hallmarks of PSP.
• These neuroimaging patterns aid in the differential diagnosis of PSP.