EURORAD ESR

Case 7501

Cubital tunnel syndrome due to anconeus epitrochlearis muscle

Author(s)
Moutinho R, Sampaio R.
 
Patient
male, 21 year(s)
 
 
  • Figure 1
    Axial MR images
     

    Axial T1W image (TR 533 ms / TE 20 ms) shows the anconeus epithroclearis muscle (large arrow) extending across the cubital fossa from the medial cortex of the olecranon (∗) to the medial epicondyle (arrowhead)....

     

    Axial FatSat PDW image (TR 2000 ms / TE 30 ms) shows the accessory or anomalous anconeus epithroclearis muscle.(large arrow) and abnormal high signal intensity of the ulnar nerve due to oedema (small arrow).

     

    Axial FatSat PDW image (TR 2000 ms / TE 30 ms) shows the accessory or anomalous anconeus epithroclearis muscle.(large arrow) and abnormal high signal intensity of the ulnar nerve due to oedema (small arrow).

     
     
     
  • Figure 2
    Coronal MR images
     

    Coronal T1W image (TR 450 ms / TE 20 ms) shows the enlarged ulnar nerve (arrow).

     

    Coronal T1W image (TR 450 ms / TE 20 ms) shows the accessory or anomalous anconeus epithroclearis muscle (arrow).

     

    Coronal FatSat PDW image (TR 1800 ms / TE 30 ms) shows the abnormal high signal intensity of the ulnar nerve (arrow).

     
     
     
  • Figure 3
    Sagittal MR images
     

    Sagittal T1W image (TR 400 ms / TE 20 ms) shows the anconeus epitrochlearis muscle (large arrow) just posterior to the ulnar nerve (small arrow).

     

    Sagittal gradient echo T2* image (TR 410 ms / TE 13 ms) shows abnormal high signal intensity of the ulnar nerve (small arrow) anterior to the accessory muscle (large arrow).

     
     
     
Axial T1W image (TR 533 ms / TE 20 ms) shows the anconeus epithroclearis muscle (large arrow) extending across the cubital fossa from the medial cortex of the olecranon (∗) to the medial epicondyle (arrowhead). Ulnar nerve (small arrow).
 
Axial FatSat PDW image (TR 2000 ms / TE 30 ms) shows the accessory or anomalous anconeus epithroclearis muscle.(large arrow) and abnormal high signal intensity of the ulnar nerve due to oedema (small arrow).
 
Axial FatSat PDW image (TR 2000 ms / TE 30 ms) shows the accessory or anomalous anconeus epithroclearis muscle.(large arrow) and abnormal high signal intensity of the ulnar nerve due to oedema (small arrow).
 
Coronal T1W image (TR 450 ms / TE 20 ms) shows the enlarged ulnar nerve (arrow).
 
Coronal T1W image (TR 450 ms / TE 20 ms) shows the accessory or anomalous anconeus epithroclearis muscle (arrow).
 
Coronal FatSat PDW image (TR 1800 ms / TE 30 ms) shows the abnormal high signal intensity of the ulnar nerve (arrow).
 
Sagittal T1W image (TR 400 ms / TE 20 ms) shows the anconeus epitrochlearis muscle (large arrow) just posterior to the ulnar nerve (small arrow).
 
Sagittal gradient echo T2* image (TR 410 ms / TE 13 ms) shows abnormal high signal intensity of the ulnar nerve (small arrow) anterior to the accessory muscle (large arrow).
 
 
 
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