{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T05:30:25Z","timestamp":1773984625314,"version":"3.50.1"},"reference-count":7,"publisher":"BMJ","issue":"10","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2021,9,5]]},"published-print":{"date-parts":[[2021,10]]},"abstract":"<jats:p>The posterior interosseous nerve is the terminal motor branch of the radial nerve that innervates the extensor carpi ulnaris and the extensors of the thumb and fingers. We describe a case of a posterior interosseous neuropathy presenting with the typical \u2018finger drop\u2019 and partial \u2018wrist drop\u2019. We focus on the clinical signs that distinguish it from a more proximal radial neuropathy, clarified by nerve conduction studies and needle electromyography. Multimodal imaging of the forearm did not identify a compressive lesion. Persistent symptoms prompted surgical exploration 5\u2009years after initial onset. It identified compression of the posterior interosseous nerve in the region of the arcade of Frohse and leash of Henry. The sites were decompressed and concurrent salvage secondary reconstructive tendon transfers were required in view of the severe axonal loss with minimal chance of functional reinnervation.<\/jats:p>","DOI":"10.1136\/bcr-2021-245659","type":"journal-article","created":{"date-parts":[[2021,10,1]],"date-time":"2021-10-01T10:43:00Z","timestamp":1633084980000},"page":"e245659","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Posterior interosseous neuropathy: distinguishing from a proximal radial neuropathy"],"prefix":"10.1136","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0639-523X","authenticated-orcid":false,"given":"Mary Clare","family":"McKenna","sequence":"first","affiliation":[{"name":"Clinical Neurophysiology, St Vincent's University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jack","family":"Woods","sequence":"additional","affiliation":[{"name":"Plastic and Reconstructive Surgery, St Vincent's University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R\u00f3is\u00edn","family":"Dolan","sequence":"additional","affiliation":[{"name":"Plastic and Reconstructive Surgery, St Vincent's University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Se\u00e1n","family":"Connolly","sequence":"additional","affiliation":[{"name":"Clinical Neurophysiology, St Vincent's University Hospital, Dublin, Ireland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,10,1]]},"reference":[{"key":"2025082713113261000_14.10.e245659.1","unstructured":"Stewart J . Focal peripheral neuropathies. 2nd ed. New York, USA: Raven Press, 1993."},{"key":"2025082713113261000_14.10.e245659.2","doi-asserted-by":"crossref","first-page":"310","DOI":"10.1177\/1753193418813788","article-title":"Isolated spontaneous posterior interosseous nerve palsy: a review of aetiology and management","volume":"44","author":"McGraw","year":"2019","journal-title":"J Hand Surg Eur Vol"},{"key":"2025082713113261000_14.10.e245659.3","doi-asserted-by":"crossref","DOI":"10.3390\/diagnostics10060366","article-title":"The branching and innervation pattern of the radial nerve in the forearm: Clarifying the literature and understanding variations and their clinical implications","volume":"10","author":"Sawyer","year":"2020","journal-title":"Diagnostics"},{"key":"2025082713113261000_14.10.e245659.4","unstructured":"Wheeler R , DeCastro A . Posterior interosseous nerve syndrome. StatPearls. Treasure Island (FL): StatPearls Publishing LLC, 2021."},{"key":"2025082713113261000_14.10.e245659.5","doi-asserted-by":"crossref","first-page":"1525","DOI":"10.1016\/j.jhsa.2008.05.033","article-title":"Posterior interosseous nerve palsy due to schwannoma: case report","volume":"33","author":"Ichikawa","year":"2008","journal-title":"J Hand Surg Am"},{"key":"2025082713113261000_14.10.e245659.6","doi-asserted-by":"crossref","first-page":"826","DOI":"10.1016\/j.jhsa.2017.07.026","article-title":"Management of atraumatic posterior interosseous nerve palsy","volume":"42","author":"Sigamoney","year":"2017","journal-title":"J Hand Surg Am"},{"key":"2025082713113261000_14.10.e245659.7","doi-asserted-by":"crossref","first-page":"126","DOI":"10.1097\/BPB.0000000000000680","article-title":"Radial nerve palsies associated with paediatric supracondylar humeral fractures: a caution in the interpretation of neurophysiological studies","volume":"29","author":"Dolan","year":"2020","journal-title":"J Pediatr Orthop B"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2021-245659","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T20:11:40Z","timestamp":1756325500000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2021-245659"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,10]]},"references-count":7,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2021,10,1]]},"published-print":{"date-parts":[[2021,10]]}},"alternative-id":["10.1136\/bcr-2021-245659"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2021-245659","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,10]]}}}