Hemimasticatory Spasm Secondary to Biopercular Syndrome

Jiménez‐Jiménez, Félix Javier; Puertas, Inmaculada; Alonso‐Navarro, Hortensia

doi:10.1159/000115644

Cited by 16 publications

(3 citation statements)

References 25 publications

(40 reference statements)

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“…The injected muscles were the masseter (39.3%), temporalis (21.4%), and medial pterygoid (4.3%). Of the 48 patients treated with BoNT, 19 ( 17 , 21 , 24 , 55 ) including 14 in this study received Botox; 3 ( 15 , 22 ) received Dysport (Oculinum) ( 13 ), Myotox ( 50 ), and incobotulinumtoxin ( 42 ) in one case each. BoNT formulation was not described in 23 cases.…”

Section: Resultsmentioning

confidence: 99%

“…The mechanism underlying HMS remains unclear, although vascular compression or focal demyelination of the trigeminal nerve has been considered a plausible etiology ( 8 , 11 – 13 ). There are some options for the treatment of HMS, including oral medication, botulinum neurotoxin (BoNT) therapy ( 12 , 13 , 15 , 17 , 19 , 21 , 22 , 24 , 25 , 27 , 28 , 34 , 36 , 38 , 39 , 42 – 45 , 47 , 49 ), and microvascular decompression of the trigeminal motor root ( 31 – 33 , 39 – 41 , 50 ). BoNT injection into the affected muscles is believed to be the most effective option.…”

Section: Introductionmentioning

confidence: 99%

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Hemimasticatory spasm: a series of 17 cases and a comprehensive review of the literature

Yoshida

2024

Front. Neurol.

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Hemimasticatory spasm (HMS) is a rare movement disorder characterized by paroxysmal spasms or twitches of the unilateral jaw-closing muscles. This study aimed to comprehensively evaluate the clinical features of patients with HMS. Data from 17 patients newly diagnosed with HMS (12 females and 5 males; mean age at onset: 46.7 years) who visited our department were retrospectively analyzed, and a literature search based on electronic medical databases from their inception until November 30, 2023, was conducted. A manual search was conducted for articles cited in the related literature. A total of 117 cases (72 females and 45 males; mean age at onset: 37.1 years) from 57 studies were analyzed. The muscles involved were the masseter (97.4%), temporalis (47.9%), and medial pterygoid (6%). Morphea or scleroderma was observed in 23.9% of the patients, and facial hemiatrophy in 27.4%. In 17.9% of the cases, Parry–Romberg syndrome was either complicated or suspected. Typical electromyographic findings included the absence of a silent period during spasms (23.9%) and irregular brief bursts of multiple motor unit potentials. Oral medicines, such as clonazepam or carbamazepine, alleviated the symptoms for some patients but were often unsatisfactory. Botulinum toxin therapy was effective in most cases. Recently, microvascular decompression surgery is increasingly being used, resulting in complete relief in some cases. In conclusion, highly effective modalities are currently available, and it is necessary to raise awareness of HMS to ensure that it can be diagnosed and treated accurately by both medical and dental professionals.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hemimasticatory spasm: a series of 17 cases and a comprehensive review of the literature

Yoshida

2024

Front. Neurol.

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“…Pontine infarction [11] is also able to cause HMS. The condition might also be secondary to biopercular syndrome [12] . All of these theories are possible fits for HMS.…”

Section: Discussionmentioning

confidence: 99%

Hemimasticatory spasm caused by single venous compression of the root of the trigeminal nerve: An MRI study for a case report and review of literature

Wang,

Peng,

Zhang

et al. 2024

Radiology Case Reports

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Hemi Masticatory Spasm: Series of 7 Cases and Review of Literature

Radhakrishnan

Goyal

Shukla

et al. 2019

Movement Disord Clin Pract

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Background Hemi masticatory spasm (HMS) is a rare movement disorder affecting muscles of mastication attributed to dysfunction of motor branch of trigeminal nerve and is characterized by painful spasm of masticatory muscles. Microvascular compression leading to focal demyelination of motor branch of trigeminal nerve is the most speculated on mechanism of HMS. Treatment options range from medical to surgical approaches, but botulinm toxin (BTX) has now become the preferred treatment. Cases We report a retrospective review of 7 cases of HMS, supported by electrophysiological and clinical findings. All the cases had excellent response to BTX therapy. Discussion and Conclusion In this article, we highlight the delay in diagnosis of HMS attributed to rarity, long course of illness, association with hemiatrophy, “Lichen Sclerosus et Atrophicus,” and scleroderma/morphea. Considering the favorable outcome to BTXs, surgical treatment can be avoided or delayed in majority except secondary cases.

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Hemimasticatory Spasm Secondary to Biopercular Syndrome

Cited by 16 publications

References 25 publications

Hemimasticatory spasm: a series of 17 cases and a comprehensive review of the literature

Hemimasticatory spasm: a series of 17 cases and a comprehensive review of the literature

Hemimasticatory spasm caused by single venous compression of the root of the trigeminal nerve: An MRI study for a case report and review of literature

Hemi Masticatory Spasm: Series of 7 Cases and Review of Literature

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