28th May 2025

A 62-year-old man presents with left-sided arm weakness, feeling off balance and changes to his vision.

A 62-year-old man presents with left-sided arm weakness, feeling off balance and changes to his vision. He has a background of hypertension and type 2 diabetes mellitus. 

Positive examination findings are a left-sided facial droop, left arm and leg weakness and a left-sided homonymous hemianopia. His CT scan is shown (see image below).

CT scan

What is the diagnosis?

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