From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal
Guyon’s canal syndrome is an uncommon distal ulnar neuropathy caused by compression within the wrist. We report a case of delayed ulnar nerve entrapment secondary to post-traumatic fibrosis, diagnosed nine years after wrist injury and surgery. High-resolution ultrasonography demonstrated focal nerve...
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Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología
2026
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/med/article/view/48175 |
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I10-R327-article-481752026-03-11T21:02:32Z From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal Del traumatismo a la fibrosis: un caso de atrapamiento del nervio cubital en el canal de Guyon Do trauma à fibrose: um caso de aprisionamento do nervo ulnar no canal de Guyon Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís ultrasonography ulnar nerve ulnar nerve compression syndromes Neurology Radiology Orthopedics ultrasonografía nervio cubital síndromes de compresión del nervio cubital Neurología Radiología Ortopedia ultrassonografia nervo ulnar síndromes de compressão do nervo ulnar Neurologia Radiologia Ortopedia Guyon’s canal syndrome is an uncommon distal ulnar neuropathy caused by compression within the wrist. We report a case of delayed ulnar nerve entrapment secondary to post-traumatic fibrosis, diagnosed nine years after wrist injury and surgery. High-resolution ultrasonography demonstrated focal nerve compression within Guyon’s canal adjacent to fibrotic tissue. The patient presented with chronic sensory deficits and hypothenar atrophy. Conservative treatment led to partial symptom control. This case highlights delayed post-surgical fibrosis as a potential cause of Guyon’s canal syndrome and underscores the diagnostic value of ultrasound in chronic compressive neuropathies. El síndrome del canal de Guyon es una neuropatía distal del nervio cubital poco frecuente causada por compresión a nivel de la muñeca. Presentamos un caso de atrapamiento tardío del nervio cubital secundario a fibrosis postraumática, diagnosticado nueve años después de una lesión y cirugía de la muñeca. La ultrasonografía de alta resolución demostró compresión focal del nervio dentro del canal de Guyon adyacente a tejido fibrótico. El paciente presentó déficits sensoriales crónicos y atrofia hipotenar. El tratamiento conservador permitió un control parcial de los síntomas. Este caso resalta la fibrosis postquirúrgica tardía como una posible causa del síndrome del canal de Guyon y subraya el valor diagnóstico del ultrasonido en neuropatías compresivas crónicas. A síndrome do canal de Guyon é uma neuropatia distal do nervo ulnar incomum causada por compressão ao nível do punho. Relatamos um caso de aprisionamento tardio do nervo ulnar secundário à fibrose pós-traumática, diagnosticado nove anos após lesão e cirurgia no punho. A ultrassonografia de alta resolução demonstrou compressão focal do nervo no interior do canal de Guyon, adjacente a tecido fibrótico. O paciente apresentou déficits sensoriais crônicos e atrofia hipotênar. O tratamento conservador resultou em controle parcial dos sintomas. Este caso destaca a fibrose pós-cirúrgica tardia como possível causa da síndrome do canal de Guyon e reforça o valor diagnóstico da ultrassonografia nas neuropatias compressivas crônicas Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología 2026-03-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/med/article/view/48175 10.31053/1853.0605.v83.n1.48175 Revista de la Facultad de Ciencias Médicas de Córdoba.; Vol. 83 No. 1 (2026): Avance de publicación; e48175 Revista de la Facultad de Ciencias Médicas de Córdoba; Vol. 83 Núm. 1 (2026): Avance de publicación; e48175 Revista da Faculdade de Ciências Médicas de Córdoba; v. 83 n. 1 (2026): Avance de publicación; e48175 1853-0605 0014-6722 10.31053/1853.0605.v83.n1 spa https://revistas.unc.edu.ar/index.php/med/article/view/48175/52566 https://revistas.unc.edu.ar/index.php/med/article/view/48175/52567 Derechos de autor 2026 Universidad Nacional de Córdoba https://creativecommons.org/licenses/by-nc/4.0 |
| institution |
Universidad Nacional de Córdoba |
| institution_str |
I-10 |
| repository_str |
R-327 |
| container_title_str |
Revista de la Facultad de Ciencias Médicas de Córdoba |
| language |
Español |
| format |
Artículo revista |
| topic |
ultrasonography ulnar nerve ulnar nerve compression syndromes Neurology Radiology Orthopedics ultrasonografía nervio cubital síndromes de compresión del nervio cubital Neurología Radiología Ortopedia ultrassonografia nervo ulnar síndromes de compressão do nervo ulnar Neurologia Radiologia Ortopedia |
| spellingShingle |
ultrasonography ulnar nerve ulnar nerve compression syndromes Neurology Radiology Orthopedics ultrasonografía nervio cubital síndromes de compresión del nervio cubital Neurología Radiología Ortopedia ultrassonografia nervo ulnar síndromes de compressão do nervo ulnar Neurologia Radiologia Ortopedia Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal |
| topic_facet |
ultrasonography ulnar nerve ulnar nerve compression syndromes Neurology Radiology Orthopedics ultrasonografía nervio cubital síndromes de compresión del nervio cubital Neurología Radiología Ortopedia ultrassonografia nervo ulnar síndromes de compressão do nervo ulnar Neurologia Radiologia Ortopedia |
| author |
Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís |
| author_facet |
Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís Lázaro, Luan Nascimento Alvarenga, Pedro Henrique de Oliveira Soares, Ocacir de Souza Reis Duarte, Márcio Luís |
| author_sort |
Lázaro, Luan Nascimento |
| title |
From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal |
| title_short |
From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal |
| title_full |
From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal |
| title_fullStr |
From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal |
| title_full_unstemmed |
From trauma to fibrosis: a case of ulnar nerve entrapment in Guyon’s canal |
| title_sort |
from trauma to fibrosis: a case of ulnar nerve entrapment in guyon’s canal |
| description |
Guyon’s canal syndrome is an uncommon distal ulnar neuropathy caused by compression within the wrist. We report a case of delayed ulnar nerve entrapment secondary to post-traumatic fibrosis, diagnosed nine years after wrist injury and surgery. High-resolution ultrasonography demonstrated focal nerve compression within Guyon’s canal adjacent to fibrotic tissue. The patient presented with chronic sensory deficits and hypothenar atrophy. Conservative treatment led to partial symptom control. This case highlights delayed post-surgical fibrosis as a potential cause of Guyon’s canal syndrome and underscores the diagnostic value of ultrasound in chronic compressive neuropathies. |
| publisher |
Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología |
| publishDate |
2026 |
| url |
https://revistas.unc.edu.ar/index.php/med/article/view/48175 |
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