• general medicine (see internal medicine)
• intensive & critical care
• neurology
• head & neck imaging
• toxicology

An 80-year-old woman presented to the emergency department with acute behavioural changes. She experienced emotional liability, urinary incontinence, copracrasia, tremors, confusion, slowness of movement and difficulty in problem solving. Her previous medical history was mild hypertension and dementia. Her vital signs were unremarkable. A T2-weighted fluid-attenuated inversion recovery MRI scan showed symmetric hyperintense signals in the bilateral globus pallidus (figure 1). Her family disclosed that she was treated at a hospital for carbon monoxide …