Parsonage-Turner syndrome versus post traumatic muscle contusion

Diffuse enlargement of the supraspinatus muscle demonstrating high interstitial STIR signal intensity sparing the tendon –likely suggestive of neurogenic edema , related to acute supracapsular nerve denervation (Parsonage-Turner syndrome versus post traumatic muscle contusion).

The infraspinatus muscle and tendon appear unremarkable.

No evidence of discrete collection.