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Insights into Imaging
Fig. 15 | Insights into Imaging

Fig. 15

From: Can imaging be the new yardstick for diagnosing peripheral neuropathy?—a comparison between high resolution ultrasound and MR neurography with an approach to diagnosis

Fig. 15

a Characteristic fusiform swelling in continuity of the ulnar nerve can be seen on this ultrasound image, suggestive of peripheral nerve sheath tumour. b PD FS image shows a fusiform swelling which is hyperintense (red arrow) with internal hypointense areas, suggestive of collagenous stroma. The ulnar nerve (yellow arrow) can be seen forming a tail, entering and exiting from the lesion, which was diagnosed to be a PNST. c Post-contrast T1 FS image shows vivid enhancement in the PNST. d Well-defined fusiform hypoechoic lesion (white arrowheads) is noted in continuity of superficial branch of radial nerve in the region of the anatomical snuffbox, just distal to the radial styloid. e Similar lesions are seen on T1-weighted coronal image. A well-defined, T1 hypointense, fusiform lesion (white arrowhead) in continuity with the superficial branch of radial nerve at the distal end of radius can be seen. f Axial post-contrast fat-saturated T1 image showing well-defined hypointense lesion surrounded by an enhancing capsule (arrowhead) in continuity with superficial branch of radial nerve. Another similar lesion (arrow) showing heterogenous contrast enhancement with hypointense areas within can be seen in continuity with the median nerve. This lesion was T2 and PD hyperintense with cystic degenerative changes on ultrasound and MRI. These MR findings fit the description of ancient schwannomas [35]

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