Abstract
Paralysis of the posterior interosseous nerve (PIN) secondary to compression is a rare clinical condition. Entrapment neuropathy may occur at fibrous bands at the proximal, middle, or distal edge of the supinator. Tumors are a relatively rare but well-known potential cause. The authors present 2 cases of PIN lesions in which compression by a benign lipoma at the level of the elbow resulted in near transection (discontinuity) of the nerve. They hypothesize a mechanism - a "sandwich effect" - by which compression was produced from below by the mass and from above by a fibrous band in the supinator muscle (i.e., the leading edge of the proximal supinator muscle [arcade of Fröhse] in one patient and the distal edge of the supinator muscle in the other). A Grade V Sunderland nerve lesion resulted from the advanced, chronic compression. The authors are unaware of a similar case with such an advanced pathoanatomical finding.
Original language | English (US) |
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Pages (from-to) | 1698-1701 |
Number of pages | 4 |
Journal | Journal of neurosurgery |
Volume | 126 |
Issue number | 5 |
DOIs | |
State | Published - May 2017 |
Keywords
- Arcade of Fröhse
- Compression
- Palsy
- Paralysis
- Peripheral nerve
- Posterior interosseous nerve
- Radial nerve
- Supinator
ASJC Scopus subject areas
- Surgery
- Clinical Neurology