Anoxic brain injury

Case contributed by Ryan Thibodeau
Diagnosis almost certain


Found down at home. Unequal pupils on physical exam.

Patient Data

Age: 65 years
Gender: Male

Symmetrical hypoattenuation of the deep grey matter structures (caudate nuclei and lentiform nuclei).

IIll-defined hypodensity at the left frontal lobe which is the external watershed area between the left anterior cerebral artery (ACA) and left middle cerebral artery (MCA) territories, in keeping with acute left external watershed infarct.

No acute intracranial bleed.

Case Discussion

This is a case of an anoxic brain injury given the clinical history and hypoattenuation of the deep grey matter structures. The patient was placed on comfort care shortly after this exam.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.