LAST CHANCE: X-ray Interpretation: Elbow Injuries - Half price course offer ends this Sunday!

Absent swallow tail sign in Parkinson disease

Case contributed by Dr Andrew Dixon

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)

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

PlayAdd to Share

Case information

rID: 31115
Published: 20th Sep 2014
Last edited: 23rd Feb 2021
Inclusion in quiz mode: Excluded

Updating… Please wait.

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

 Thank you for updating your details.