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Τρίτη 19 Απριλίου 2022

Does Liposomal Bupivicaine Injection Decrease Postoperative Opioid Usage following Bimaxillary Surgery?

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Among patients undergoing bimaxillary surgery, does the use of liposomal bupivacaine injection reduce the use of opioid analgesics and/or length of hospital admission in the postoperative period? (Source: Journal of Oral and Maxillofacial Surgery)
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Malignant Transformation of Ossifying Fibroma to Juvenile Aggressive Ossifying Fibroma to Fibroblastic Osteosarcoma: A Case Report

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The researchers present a case of mandibular juvenile ossifying fibroma (JOF) undergoing malignant transformation to fibroblastic osteosarcoma (FOS) and propose to use this unique case report. In contrast to extragnathic OS (osteosarcoma), comprehensive genomic studies of gnathic OS are lacking and, hence, there are no validated diagnostic and therapeutic molecular targets for gnathic OS. Distinguishing fibroblastic OS of the jaws from its close mimics, such as ossifying fibroma (OF) and fibromatosis of the jaws, poses major challenge for pathologists. (Source: Journal of Oral and Maxillofacial Surgery)
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Enlargement of Inferior Alveolar Nerve Canal and Mental Neuropathy Associated with B-cell Lymphoma: A Case Report and Literature Review

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Enlargement of an inferior alveolar nerve canal (IANC) on radiographic imaging can indicate the presence of a wide variety of pathologic entities. Oral and maxillofacial surgeons have the unique opportunity to regularly examine panoramic radiographs, and must exercise proficient clinical judgement when noting abnormal findings on imaging. While malignant processes associated with IANC enlargement are uncommon, these pathologies do occur and may be associated with significant sequelae, especially when accompanied by a delay in diagnosis in treatment. (Source: Journal of Oral and Maxillofacial Surgery)
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Mortality and Associated Variables of Full-mouth Extractions

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Full-mouth extractions (FMEs) are common procedures that are classically performed electively due to caries and periodontal disease. Up to 17% of adults over the age of 65 and 2% of adults aged 20-64 in the United States are edentulous. At the University of Cincinnati Medical Center, approximately 250 FMEs are performed annually with nearly half performed on adults over the age of 50. There is currently an absence of data on this patient population and their overall outcomes. The authors hypothesize that FMEs are often performed on socioeconomically and medically vulnerable populations, thereby further compromising their conditions and potentially contributing to their demise. (Source: Journal of Oral and Maxillofacial Surgery)
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Δευτέρα 18 Απριλίου 2022

Life and death of microglia: mechanisms governing microglial states and fates

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Immunol Lett. 2022 Apr 9:S0165-2478(22)00042-6. doi: 10.1016/j.imlet.2022.04.001. Online ahead of print.ABSTRACTRecent advances in genetic analysis and intensive research have revealed that microglial cells respond to external stimuli in various ways and adopt diverse states. Herein, we summarize the current knowledge on the possible microglial states during development, homeostasis, and perturbation. These states are characterized either by irreversible cellular changes, such as cell death and cellular senescence, or reversible alterations, triggered by temporary changes in the microenvironment. Subsequently, we discuss the modalities of the transcriptional and functional recovery of microglia from a molecular perspective. An understanding of (ir)reversible changes in their cellular fates...
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Effect of Intensive Oropharyngeal Training on Radiotherapy-Related Dysphagia in Nasopharyngeal Carcinoma Patients

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ConclusionsThis study indicated that intensive oropharyngeal training improves swallowing function after radiotherapy in patients with nasopharyngeal carcinoma. (Source: Dysphagia)
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Expiratory Muscle Strength Training for Drooling in Adults with Parkinson ’s Disease

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This study explored the effect of an alter native therapy approach for drooling that aimed at improving the swallow, expiratory muscle strength training (EMST). Sixteen participants received EMST over a 6- to 8-week period. Measurements were taken pre- and post-training for drooling (Sialorrhea Clinical Scale for Parkinson's Disease; SCS-P D), swallowing, lip strength and peak cough flow. Measures of drooling, swallowing and peak cough flow were stable over pre-training assessments and improved following training (p  <  0.01). The most conservative estimate of the within-group change for SCS-PD was − 2.50 (95% confidence interval −  3.22 to −  1.22). No adverse effects were reported and participants gave high satisfaction ratings for the training. A programme of EMST ...
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Identifying Dysphagia and Demographic Associations in Older Adults Using Electronic Health Records: A National Longitudinal Observational Study in Wales (United Kingdom) 2008 –2018

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This study has confirmed the association of dysphagia with increasing age and frailty. A previously unreported association wit h deprivation has been identified. Deprivation is a multifactorial problem that is known to affect health outcomes, and the association with dysphagia should not be a surprise. Research in to this relationship is indicated. (Source: Dysphagia)
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Prevalence and Risk Factors of Dysphagia in Patients with Multiple Sclerosis

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AbstractDysphagia is one of the most common symptoms in multiple sclerosis (MS) patients. It can reduce the quality of life and increase the risk of mortality by developing complications such as aspiration pneumonia. The present study was conducted to estimate the prevalence of dysphagia in MS patients and investigate the associations between dysphagia and disease characteristics. The Persian version of the DYMUS questionnaire was used to assess dysphagia in 865 patients with MS, including 738 (85.3%) relapsing –remitting MS (RRMS), 106 (12.3%) secondary progressive MS (SPMS), and 21 (2.4%) primary progressive MS (PPMS). Also, demographic and clinical data, including age, sex, smoking status, Expanded Disability Status Scale (EDSS) score, disease duration, disease-modifying therapies exp...
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Pneumonia, Mortality, and Other Outcomes Associated with Unsafe Swallowing Detected via Fiberoptic Endoscopic Evaluation of Swallowing (FEES) in Patients with Functional Oropharyngeal Dysphagia: A Systematic Review and Meta-analysis

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The objective of this study was to evaluate the risk of dysphagia complications associated with the detection of premature spillage, residue, penetration, and aspiration via FEES. A systematic review and meta-analysis of the literature were carried out. A search strategy was established using terms of controlled and free vocabulary (free text) in the PubMed, Lilacs, Embase, Medline, and Cochrane databases. The initial search in the databases identified 3545 articles, of which 321 were excluded due to duplication, 3224 were selected for review of titles and abstracts, 45 were selected for full-text review, 37 were excluded for not meeting the selection criteria, and 8 were included for the final analysis, with a total population of 1168 patients. Aspiration increased the risk of pneumonia (...
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Reliability of Ultrasound Examination of Hyoid Bone Displacement Amplitude: A Systematic Review and Meta-Analysis

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The objective of this study was to analyze the reliability of measuring hyoid bone displacement amplitude in swallowing with ultrasound. The systematic review encompassed five databases (MEDLINE, Scopus, EMBASE, Web of Science, Cochrane Library) and gray literature. There was no limitation of language or year of publication. The search/selection/extraction methodology was conducted by two authors blindly and independently, and differences were solved by a third rater. Th ree studies met the eligibility criteria: two of them analyzed the reliability in non-dysphagic populations and the other, in dysphagic patients. The transducer was positioned in the submandibular region in all studies. The authors were not clear about the training time to acquire and analyze ultras ound images. The meta-a...
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A Rare Case of Dysphagia with Palatal Tremor

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Case Presentation
A 77-year-old man with a known history of long-standing hypertension experienced a left cerebellar hemorrhage 9 months ago, then a right cerebellar hemorrhage 3 months prior to his presentation. The patient had noticeable dysphagia that required placing a nasogastric tube for nasal feeding. The standardized swallowing assessment revealed that he had an impairment in lip closure, head, and trunk control, pharyngeal reflex, as well as independent coughing. To observe the pathophysiological changes of the pharynx and larynx, a fiberoptic laryngoscope was inserted prior to the video fluoroscopic swallowing study (VFSS), which showed that there was no pathophysiological change. VFSS detected the rhythmic tremor of the soft palate and epiglottis, with residues displayed in the vallecula and pyriform sinuses.

Magnetic resonance imaging (MRI) depicted bilateral long T2 signal shadows in the cerebellum, enlargement of the bilateral olivary nucleus, with a longer T2-weighted signal change. The T2 FLAIR image demonstrated an increased signal change, with the right inferior olivary nucleus (ION) obviously larger than the left. (Fig. 1) (9 months after the left cerebellar hemorrhage, 3 months after the right cerebellar hemorrhage).

Fig. 1
figure 1
Axial T2 and FLAIR images: long T2 signal shadows were observed in the right cerebellum, and low-density circular shadows were observed around the lesion, with patchy long T2 signal changes in the left cerebellum. The area of the bilateral olivary nucleus was enlarged, with a longer T2-weighted signal change, and the T2 FLAIR image showed an increased signal change, the right ION was obviously larger than the left

Full size image
Diagnosis
The patient presented with a palatal tremor (PT) after two episodes of cerebellar hemorrhage. MRI indicated bilateral hypertrophic degeneration of the olivary nucleus, especially on the left side. These findings taken together confirmed a diagnosis of hypertrophic olivary degeneration (HOD).

HOD is a rare neurological condition characterized by trans-synaptic degeneration that occurs secondary to focal lesions disrupting the normal function of the afferent fibers to the ION as part of the dentate–rubro–olivary pathways (Guillain–Mollaret triangle, GMT) [1]. Possible etiologies for this condition include infarction, toxicosis, trauma, surgery, tumors, vascular malformations or hemorrhage. In this case, the patient developed HOD secondary to cerebellar hemorrhage [2].

Discussion
GMT is composed of the contralateral dentate nucleus (DN), the ipsilateral red nucleus (RN) and the ipsilateral ION. DN, RN, and ION form an afferent and efferent loop pathway. The fibers from the DN are crossed by the superior cerebellar foot and reach the contralateral midbrain red nucleus. The red nucleus sends fibers descending through the central tegmental bundle to the ipsilateral ION for relay. The ION is then emitted from fibers passing through the cerebellar inferior foot (ICP) to the contralateral cerebellar cortex and projected onto the DN, constituting the complete GMT [2] (Fig. 2).

Fig. 2
figure 2
Guillain–Mollaret triangle

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When the primary lesion is located within the cerebellum, contralateral ION degeneration occurs, which is due to the decussation of the dentate-rubral fibers. A unilateral lesion in a cerebellar hemisphere usually causes contralateral HOD, and only a rare number of cases of bilateral HOD have been described with lesions affecting a single cerebellar hemisphere [2].

HOD is characterized by enlargement and increased T2 hyperintense signal of the ION [3]. The classic clinical presentation associated with HOD is a PT [4] which was observed in this patient. Dentatorubral tremors and ocular myoclonus are other associated movement disorders [4], but were not observed in this case. This muscle tremor may affect the patient's peristalsis, which is manifested as an incomplete epiglottic closure during swallowing, food residues in the vallecula and pyriform sinuses, leading to penetration-aspiration, resulting in dysphagia. The exact pathogenesis of the tremor is not clear, but the currently accepted hypothesis involves the interruption of GABAergic descending inhibition of the dentate–olivary tract during de-afferentiation of the triangle [5].

We treated the patient with electric stimulation, vocal cord movement and airway protection training for dysphagia, but the results were not satisfactory. Previous literature reports indicated that the medical treatment of PT is unsatisfactory and is often ineffective. some patients may respond to medications such as valproic acid, carbamazepine, clonazepam, tryptophan, trihexyphenidyl, or levetiracetam [6]. This patient was treated sequentially with propranolol, clonazepam, and levetiracetam, but his symptoms persisted.

Conclusion
In this study, we report an unusual case of dysphagia following two episodes of cerebellar hemorrhage. Despite the fact that dysphagia after stroke is fairly common, the different etiologies and pathogenesis related to this condition should be identified, especially the rare causes of dysphagia. The patient is not responding well to treatment; thus, we need to follow up him for a long period of time to observe the changes in his condition.

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Affiliations
Department of Rehabilitation Medicine, Chengdu Second People's Hospital, No. 10 Qingyunnan Street, Jinjiang District, Chengdu, 610017, Sichuan, China

Tao Xiang, Yingyue Yang & Juan Li

Department of Neurology, Chengdu Second People's Hospital, Chengdu, 610017, Sichuan, China

Feng Wang

Corresponding author
Correspondence to Tao Xiang.

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Xiang, T., Wang, F., Yang, Y. et al. A Rare Case of Dysphagia with Palatal Tremor. Dysphagia 36, 758–760 (2021). https://doi.org/10.1007/s00455-020-10185-0

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Received
15 July 2020

Accepted
24 August 2020

Published
03 September 2020

Issue Date
August 2021

DOI
https://doi.org/10.1007/s00455-020-10185-0

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