Intraosseous schwannoma of the hamate bone presented in this case is a very rare benign tumor, and its diagnosis combined with clinical, imaging and needle biopsy is important to guide further therapy. The diagnosis of schwannoma of the hamate was proved histologically following its surgical treatment by curettage.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5337820PMC
http://dx.doi.org/10.4081/cp.2017.920DOI Listing

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Intraosseous schwannoma of the hamate bone presented in this case is a very rare benign tumor, and its diagnosis combined with clinical, imaging and needle biopsy is important to guide further therapy. The diagnosis of schwannoma of the hamate was proved histologically following its surgical treatment by curettage.

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Purpose: The purposes of this study were to determine the distribution of causes and sites of nerve compression in the ulnar tunnel (Guyon's canal), and investigate the relationship between ulnar tunnel syndrome (UTS) and other conditions associated with it.

Methods: We performed a retrospective review of 31 patients diagnosed with and treated for UTS to determine the most common cause of compression and the sites of compression, systemic illnesses associated with UTS, and postoperative results.

Results: The cause of ulnar nerve compression was idiopathic in 14, trauma in 8, a thrombosis in 2, proliferation of synovium in 2, a prominent hook of the hamate in 1, a schwannoma in 1, postoperative swelling in 1, an aberrant fibrous band in 1, and a ganglion in 1.

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Distal ulnar nerve entrapment due to tumors of Guyon's canal. A series of ten cases.

Handchir Mikrochir Plast Chir

March 1993

Chirurgie de la Main et Microchirurgie, SOS Main Strasbourg.

The authors reviewed ten cases of distal ulnar nerve entrapment neuropathy due to tumors of Guyon's canal. Clinically, there were two sensory, four purely motor, and four mixed neuropalsies. EMG findings correlated with clinical signs.

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