70-year-old male with headaches and confusion

Submitted by Brian M. Trotta, MD, University of Virginia Department of Radiology, Charlottesville, VA.

A 70-year-old male presents with a history of increasing headaches and confusion.

What is the most likely diagnosis?

Glioblastoma multiforme
Gliomatosis cerebri
Cerebral amyloid angiopathy
Progressive multifocal leukoencephalopathy

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