Fig. 15
From: Nerve entrapment syndromes of the upper limb: a pictorial review
Cases of ulnar nerve entrapment at the elbow are illustrated. a Axial PDFS elbow in 50-year-old female with ulnar nerve neuropathy. The ulnar nerve (white arrow) returns increased signal intensity at the level of the cubital tunnel and is focally enlarged. b Sagittal PDFS elbow of a 54-year-old male with ulnar neuropathy. The ulnar nerve is enlarged (white arrow), with compression as it enters between the two flexor carpi ulnaris heads (blue arrows). c Axial PD elbow of a 60-year-old male showing the normal variant anconeus epitrochlearis (blue arrow) superficial to the ulnar nerve (white arrow) at the cubital tunnel. This can predispose to ulnar nerve entrapment