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Posterior Dislocation of the Shoulder: The Light-Bulb Sign

Posterior dislocation is a rather rare injury, often misdiagnosed. The current report offers valuable insights regarding the anatomical background of this clinical entity and emphasizes the 'light-bulb sign,' which can be observed in anterior-posterior shoulder X-rays when there is a poste...

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Autores principales: Koutserimpas, Christos, Piagkou, Maria, Karaiskos, Ilias, Chronopoulos, Efstathios, Arkoudis, Nikolaos-Achilleas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cureus 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679799/
https://www.ncbi.nlm.nih.gov/pubmed/38022099
http://dx.doi.org/10.7759/cureus.47800
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author Koutserimpas, Christos
Piagkou, Maria
Karaiskos, Ilias
Chronopoulos, Efstathios
Arkoudis, Nikolaos-Achilleas
author_facet Koutserimpas, Christos
Piagkou, Maria
Karaiskos, Ilias
Chronopoulos, Efstathios
Arkoudis, Nikolaos-Achilleas
author_sort Koutserimpas, Christos
collection PubMed
description Posterior dislocation is a rather rare injury, often misdiagnosed. The current report offers valuable insights regarding the anatomical background of this clinical entity and emphasizes the 'light-bulb sign,' which can be observed in anterior-posterior shoulder X-rays when there is a posterior dislocation. It is crucial for healthcare professionals, including emergency department physicians, radiologists, general practitioners, orthopedic surgeons, and other relevant medical experts, to be well-acquainted with this sign and maintain a heightened awareness when encountering such cases. A 57-year-old male presented to the Emergency Department due to right shoulder pain immediately after an epileptic seizure. His arm was locked in internal rotation, while the initial X-rays, although did not reveal evident malalignment, showed the light-bulb sign. Further imaging with a computer tomography (CT) scan exhibited a large (50%) reverse Hill-Sachs defect. The patient was treated surgically with hemiarthroplasty. The light-bulb sign should be a red flag for physicians who evaluate these patients or these X-rays. The patient’s history, such as epileptic seizures and examination, especially the locked arm in internal rotation, are of paramount importance for not misdiagnosing these cases.
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spelling pubmed-106797992023-10-27 Posterior Dislocation of the Shoulder: The Light-Bulb Sign Koutserimpas, Christos Piagkou, Maria Karaiskos, Ilias Chronopoulos, Efstathios Arkoudis, Nikolaos-Achilleas Cureus Medical Education Posterior dislocation is a rather rare injury, often misdiagnosed. The current report offers valuable insights regarding the anatomical background of this clinical entity and emphasizes the 'light-bulb sign,' which can be observed in anterior-posterior shoulder X-rays when there is a posterior dislocation. It is crucial for healthcare professionals, including emergency department physicians, radiologists, general practitioners, orthopedic surgeons, and other relevant medical experts, to be well-acquainted with this sign and maintain a heightened awareness when encountering such cases. A 57-year-old male presented to the Emergency Department due to right shoulder pain immediately after an epileptic seizure. His arm was locked in internal rotation, while the initial X-rays, although did not reveal evident malalignment, showed the light-bulb sign. Further imaging with a computer tomography (CT) scan exhibited a large (50%) reverse Hill-Sachs defect. The patient was treated surgically with hemiarthroplasty. The light-bulb sign should be a red flag for physicians who evaluate these patients or these X-rays. The patient’s history, such as epileptic seizures and examination, especially the locked arm in internal rotation, are of paramount importance for not misdiagnosing these cases. Cureus 2023-10-27 /pmc/articles/PMC10679799/ /pubmed/38022099 http://dx.doi.org/10.7759/cureus.47800 Text en Copyright © 2023, Koutserimpas et al. https://creativecommons.org/licenses/by/3.0/This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Medical Education
Koutserimpas, Christos
Piagkou, Maria
Karaiskos, Ilias
Chronopoulos, Efstathios
Arkoudis, Nikolaos-Achilleas
Posterior Dislocation of the Shoulder: The Light-Bulb Sign
title Posterior Dislocation of the Shoulder: The Light-Bulb Sign
title_full Posterior Dislocation of the Shoulder: The Light-Bulb Sign
title_fullStr Posterior Dislocation of the Shoulder: The Light-Bulb Sign
title_full_unstemmed Posterior Dislocation of the Shoulder: The Light-Bulb Sign
title_short Posterior Dislocation of the Shoulder: The Light-Bulb Sign
title_sort posterior dislocation of the shoulder: the light-bulb sign
topic Medical Education
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679799/
https://www.ncbi.nlm.nih.gov/pubmed/38022099
http://dx.doi.org/10.7759/cureus.47800
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