Absent swallow tail sign in Parkinson disease

Case contributed by Andrew Dixon
Diagnosis certain

Patient Data

Age: 60 years
Gender: Male

Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

MRI Brain (selected image)

mri

Clinical high resolution 3D-T2*/SWI MRI (Philips ‘PRESTO’ sequence) of a Parkinson's disease patient showing absence of the normal high SWI signal within the nigrosome-1 bilaterally (absent swallow tail sign). 

Case Discussion

Image and text used under creative commons licence. Original source: Schwarz ST, Afzal M, Morgan PS et-al. The 'swallow tail' appearance of the healthy nigrosome - a new accurate test of Parkinson's disease: a case-control and retrospective cross-sectional MRI study at 3T. PLoS ONE. 2014;9 (4): e93814. doi:10.1371/journal.pone.0093814

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.