MRI diagnosis of occult ganglion compression of the posterior interosseous nerve and associated supinator muscle pathology

Some tumors or tumorous conditions causing posterior interosseous nerve palsy are well documented, but myositis ossificans causing the palsy of this nerve has not been described. We present a case of posterior interosseous nerve palsy caused by myositis ossificans of the supinator muscle.

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Compression of the Radial Nerve Caused by an Occult Ganglion

Journal of Hand Surgery (European Volume) ◽

10.1016/s0266-7681(98)80073-9 ◽

1998 ◽

Vol 23 (3) ◽

pp. 420-421 ◽

Cited By ~ 21

Author(s):

R. STEIGER ◽

E. VÖGELIN

Keyword(s):

Radial Nerve ◽

Nerve Palsy ◽

Nerve Compression ◽

Posterior Interosseous Nerve ◽

Supinator Muscle

We report on three patients with radial nerve compression in the region of the supinator muscle caused by an occult ganglion. After excision of the ganglion and decompression of the posterior interosseous nerve, the nerve palsy resolved completely in all cases.

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Posterior interosseous nerve palsy in a child associated with recurrent dislocation of the head of the radius

Journal of Neurosurgery Pediatrics ◽

10.3171/2013.1.peds12411 ◽

2013 ◽

Vol 11 (4) ◽

pp. 389-391 ◽

Cited By ~ 6

Author(s):

R. Shane Tubbs ◽

Christoph Griessenauer ◽

Elias Rizk ◽

Mohammadali M. Shoja ◽

Stephen F. Pehler ◽

...

Keyword(s):

Radial Head ◽

Nerve Palsy ◽

Recurrent Dislocation ◽

Surgical Decompression ◽

Anterior Dislocation ◽

Posterior Interosseous Nerve ◽

Bone Deformity ◽

Nerve Decompression ◽

Supinator Muscle ◽

Posterior Interosseous Nerve Palsy

Injuries to the posterior interosseous nerve (PIN) appear to be very uncommon in children. In this paper, the authors describe a 9-year-old boy with a radial malunion and radial head instability that resulted in PIN compression. Surgical decompression via transection of the overlying supinator muscle with correction of the radial deformity and instability resulted in complete return of PIN function. The clinician should be aware of anterior dislocation of the radial head as a cause of PIN injury. Based on the authors' experience, nerve decompression and correction of the bone deformity result in return of normal PIN function.

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Entrapment of the posterior interosseous nerve by a fibrous band in the dorsal edge of the supinator muscle and erosion of a groove in the proximal radius

The Journal Of Hand Surgery ◽

10.1016/s0363-5023(81)80116-5 ◽

1981 ◽

Vol 6 (5) ◽

pp. 524-526 ◽

Cited By ~ 23

Author(s):

Robert S. Derkash ◽

John J. Niebauer

Keyword(s):

Posterior Interosseous Nerve ◽

Fibrous Band ◽

Proximal Radius ◽

Dorsal Edge ◽

Supinator Muscle

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Intramuscular Myxoma in the Supinator Muscle with Transient Postoperative Posterior Interosseous Nerve Palsy: A Case Report

The Open Orthopaedics Journal ◽

10.2174/1874325001812010353 ◽

2018 ◽

Vol 12 (1) ◽

pp. 353-357 ◽

Cited By ~ 1

Author(s):

Toshihiro Nonaka ◽

Motoki Sonohata ◽

Shuhei Takeshita ◽

Yosuke Oba ◽

Yoshimasa Fujii ◽

...

Keyword(s):

Nerve Palsy ◽

Posterior Interosseous Nerve ◽

Intramuscular Myxoma ◽

Resonance Imaging ◽

Mesenchymal Tumors ◽

Case Presentation ◽

Histopathological Image ◽

Supinator Muscle ◽

Intramuscular Hemangioma ◽

Posterior Interosseous Nerve Palsy

Background: Intramuscular myxomas are rare, benign mesenchymal tumors in the musculoskeletal system, and usually, the tumors arise in the large muscles of the thigh, buttocks, shoulder, and upper arm. However, a tumor of the forearm is very rare. Herein, we describe the case of an intramuscular myxoma in the supinator muscle of a 56-year-old female patient. Case Presentation: Magnetic resonance imaging showed a well-defined mass that was hypointense with the peritumoral fat ring sign. The differential diagnoses might have been myxoma, schwannoma, or intramuscular hemangioma. The histopathological image showed abundant myxoid tissue, hypocellularity, and poor vascularization. The cells of the tumor were spindle and stellate-shaped with normochromic nuclei. Based on these findings, the pathological diagnosis was an intramuscular myxoma. After excising the tumor, the patient had transient posterior interosseous nerve palsy. Conclusion: This tumor is curative by resection in toto; however, when the tumor exists in the forearm, surgeons should be careful to avoid damaging surrounding tissues because the tumor is very hard and relatively large compared to the forearm.

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The supinator muscle and the deep radial (posterior interosseous) nerve

The Anatomical Record ◽

10.1002/ar.1091010209 ◽

1948 ◽

Vol 101 (2) ◽

pp. 243-250 ◽

Cited By ~ 15

Author(s):

F. Davies ◽

M. Laird

Keyword(s):

Posterior Interosseous Nerve ◽

Supinator Muscle

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A Rare Case of Supinator Intramuscular Myxoma with Encasement of the Posterior Interosseous Nerve

Case Reports in Orthopedics ◽

10.1155/2019/5156032 ◽

2019 ◽

Vol 2019 ◽

pp. 1-4

Author(s):

Chiao Yee Lim ◽

Suryasmi Duski ◽

Ping Ching Chye

Keyword(s):

Rare Case ◽

En Bloc Resection ◽

Tumor Location ◽

Bloc Resection ◽

Posterior Interosseous Nerve ◽

Intramuscular Myxoma ◽

Mesenchymal Tumors ◽

En Bloc ◽

Post Contrast ◽

Supinator Muscle

Intramuscular myxomas are rare, benign mesenchymal tumors. Tumor location in the forearm is very rare among all the intramuscular myxomas. To the best of our knowledge, there were two cases of supinator intramuscular myxoma reported in the literature, and we intend to report the third case of supinator myxoma with encasement of the posterior interosseous nerve (PIN). A 67-year-old lady presented with history of left proximal forearm swelling for the past 5 years. Magnetic resonance imaging showed a lobulated multiseptated lesion seen within left supinator muscle, which was hyperintense on T2-weighted images (T2WI) and hypointense on T1-weighted images (T1WI), with peripheral enhancement post contrast. The tissue diagnosis of myxoma was confirmed via an open biopsy. She underwent en bloc resection of the tumor. The PIN was encased by the tumor; it was preserved and carefully released from the tumor. The nerve sheath served as an excision margin. In conclusion, we present a rare case of an intramuscular myxoma in the supinator muscle. In view of the location, extra attention should be paid during excision surgery to locate the PIN and to avoid damaging the surrounding structures.

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