Abstract Aims: In this retrospective study we assess the diagnostic yield of computed tomography pulmonary angiogram (CTPA) and the incidence of alterative and incidental diagnoses. Methods: The results

The case:

A 58 year old man was brought to the emergency department with acute confusion after being found unconscious on his floor at home. He had a background of alcohol misuse with alcoholic liver disease.

This T2 weighted MRI scan demonstrates a hyperintense trident shaped lesion extending from the pontomedullary junction to the midbrain with peripheral sparing (figure 2 – abnormality indicated by