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Article ; Online: Local recurrence of melanocytoma of the cervical spine.

Moncur, Eleanor M / Al-Ahmad, Selma / Thom, Maria / Craven, Claudia L / Choi, David

2024

Language	English
Publishing date	2024-02-06
Publishing country	Italy
Document type	Journal Article
ZDB-ID	127315-2
ISSN	2240-2993 ; 0300-9009
ISSN (online)	2240-2993
ISSN	0300-9009
DOI	10.1007/s13760-023-02459-9
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Article ; Online: Focal cortical dysplasia: a practical guide for neurologists.

Balestrini, Simona / Barba, Carmen / Thom, Maria / Guerrini, Renzo

Practical neurology

2023 Volume 23, Issue 4, Page(s) 293–302

Abstract: Focal cortical dysplasia (FCD) is a malformation of cortical development characterised by disruption of cortical cytoarchitecture. Classification of FCDs subtypes has initially been based on correlation of the histopathology with relevant clinical, ... ...

Abstract	Focal cortical dysplasia (FCD) is a malformation of cortical development characterised by disruption of cortical cytoarchitecture. Classification of FCDs subtypes has initially been based on correlation of the histopathology with relevant clinical, electroencephalographic and neuroimaging features. A recently proposed classification update recommends a multilayered, genotype-phenotype approach, integrating findings from histopathology, genetic analysis of resected tissue and presurgical MRI. FCDs are caused either by single somatic activating mutations in MTOR pathway genes or by double-hit inactivating mutations with a constitutional and a somatic loss-of-function mutation in repressors of the signalling pathway. Mild malformation with oligodendroglial hyperplasia in epilepsy is caused by somatic pathogenic
MeSH term(s)	Humans ; Malformations of Cortical Development/diagnostic imaging ; Malformations of Cortical Development/genetics ; Malformations of Cortical Development/therapy ; Focal Cortical Dysplasia ; Neurologists ; Epilepsy/pathology ; Mutation ; Drug Resistant Epilepsy
Language	English
Publishing date	2023-02-23
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	2170881-2
ISSN	1474-7766 ; 1474-7758
ISSN (online)	1474-7766
ISSN	1474-7758
DOI	10.1136/pn-2022-003404
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Article ; Online: A hybrid stochastic configuration interaction-coupled cluster approach for multireference systems.

Filip, Maria-Andreea / Thom, Alex J W

The Journal of chemical physics

2023 Volume 158, Issue 18

Abstract: The development of multireference coupled cluster (MRCC) techniques has remained an open area of study in electronic structure theory for decades due to the inherent complexity of expressing a multiconfigurational wavefunction in the fundamentally single- ...

Abstract	The development of multireference coupled cluster (MRCC) techniques has remained an open area of study in electronic structure theory for decades due to the inherent complexity of expressing a multiconfigurational wavefunction in the fundamentally single-reference coupled cluster framework. The recently developed multireference-coupled cluster Monte Carlo (mrCCMC) technique uses the formal simplicity of the Monte Carlo approach to Hilbert space quantum chemistry to avoid some of the complexities of conventional MRCC, but there is room for improvement in terms of accuracy and, particularly, computational cost. In this paper, we explore the potential of incorporating ideas from conventional MRCC-namely, the treatment of the strongly correlated space in a configuration interaction formalism-to the mrCCMC framework, leading to a series of methods with increasing relaxation of the reference space in the presence of external amplitudes. These techniques offer new balances of stability and cost against accuracy, as well as a means to better explore and better understand the structure of solutions to the mrCCMC equations.
Language	English
Publishing date	2023-05-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	3113-6
ISSN	1089-7690 ; 0021-9606
ISSN (online)	1089-7690
ISSN	0021-9606
DOI	10.1063/5.0145767
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Article ; Online: Erratum: "A stochastic approach to unitary coupled cluster" [J. Chem. Phys. 153, 214106 (2020)].

Filip, Maria-Andreea / Thom, Alex J W

The Journal of chemical physics

2022 Volume 156, Issue 22, Page(s) 229902

Language	English
Publishing date	2022-06-06
Publishing country	United States
Document type	Journal Article ; Published Erratum
ZDB-ID	3113-6
ISSN	1089-7690 ; 0021-9606
ISSN (online)	1089-7690
ISSN	0021-9606
DOI	10.1063/5.0098911
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Article ; Online: Xanthogranulomatous osteomyelitis of the cervical spine.

Perera, Andrea / Rus, Mircea / Thom, Maria / Critchley, Giles

British journal of neurosurgery

2022 , Page(s) 1–5

Abstract: Background: Xanthogranulomatous Osteomyelitis is a rare form of chronic inflammation described in a handful of cases in the reported literature involving the long bones of the axial skeleton. To the authors knowledge it has not been reported in the ... ...

Abstract	Background: Xanthogranulomatous Osteomyelitis is a rare form of chronic inflammation described in a handful of cases in the reported literature involving the long bones of the axial skeleton. To the authors knowledge it has not been reported in the spinal column. Case: We report a case of a 65 year old female presenting with features of metastatic cord compression and an expansile lesion affecting the 5th -7th cervical vertebrae. She underwent vertebrectomy, insertion of an expandable cage and plating to good effect. A histological diagnosis of Xanthogranulomatous Osteomyelitis was made. Conclusions: We report what the authors believe to be the first case in the literature of xanthogranulomatous osteomyelitis affecting the spine. In this case the patient was managed with a vertebrectomy without the need for antibiotics.
Language	English
Publishing date	2022-06-13
Publishing country	England
Document type	Journal Article
ZDB-ID	639029-8
ISSN	1360-046X ; 0268-8697
ISSN (online)	1360-046X
ISSN	0268-8697
DOI	10.1080/02688697.2022.2086967
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Article: Point-of-Care Ultrasound Identifies Pyomyositis Secondary to Intramuscular Testosterone Injection: Report of Two Cases.

Thom, Christopher / Ottenhoff, Jakob / Thom, Mary / Kongkatong, Matthew

The Journal of emergency medicine

2022 Volume 62, Issue 3, Page(s) e51–e56

Abstract: Background: Intramuscular (i.m.) injections are a commonly utilized route for medication delivery. Intramuscular-associated soft tissue infections are rare and can include pyomyositis and i.m. abscess. Intramuscular testosterone injections have not been ...

Abstract	Background: Intramuscular (i.m.) injections are a commonly utilized route for medication delivery. Intramuscular-associated soft tissue infections are rare and can include pyomyositis and i.m. abscess. Intramuscular testosterone injections have not been previously implicated in causing pyomyositis. Point-of-care ultrasound is an important bedside tool that can identify pyomyositis and differentiate this infection from more common entities such as cellulitis. Case reports: We present two cases of i.m. testosterone-associated pyomyositis. In both cases, the physical examination features were consistent with simple cellulitis. However, point-of-care ultrasound evaluation revealed changes consistent with pyomyositis in each case. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Although uncommon, i.m. injections such as testosterone carry a risk of soft tissue infection. As demonstrated in the above cases, ultrasound can be helpful in making the differentiation between simple cellulitis and pyomyositis. The emergency physician should be cognizant of this complication of therapeutic i.m. injections, as well as the diagnostic efficacy of point-of-care ultrasound in evaluating the extent and location of the soft tissue infection.
MeSH term(s)	Cellulitis/complications ; Cellulitis/diagnosis ; Cellulitis/drug therapy ; Humans ; Point-of-Care Systems ; Pyomyositis/diagnosis ; Pyomyositis/drug therapy ; Soft Tissue Infections/diagnosis ; Soft Tissue Infections/drug therapy ; Soft Tissue Infections/etiology ; Testosterone
Chemical Substances	Testosterone (3XMK78S47O)
Language	English
Publishing date	2022-01-20
Publishing country	United States
Document type	Case Reports ; Journal Article
ZDB-ID	605559-x
ISSN	0736-4679
ISSN	0736-4679
DOI	10.1016/j.jemermed.2021.11.010
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Article ; Online: Review: Hippocampal sclerosis in epilepsy: a neuropathology review.

Thom, Maria

Neuropathology and applied neurobiology

2014 Volume 40, Issue 5, Page(s) 520–543

Abstract: Hippocampal sclerosis (HS) is a common pathology encountered in mesial temporal lobe epilepsy (MTLE) as well as other epilepsy syndromes and in both surgical and post-mortem practice. The 2013 International League Against Epilepsy (ILAE) classification ... ...

Abstract	Hippocampal sclerosis (HS) is a common pathology encountered in mesial temporal lobe epilepsy (MTLE) as well as other epilepsy syndromes and in both surgical and post-mortem practice. The 2013 International League Against Epilepsy (ILAE) classification segregates HS into typical (type 1) and atypical (type 2 and 3) groups, based on the histological patterns of subfield neuronal loss and gliosis. In addition, granule cell reorganization and alterations of interneuronal populations, neuropeptide fibre networks and mossy fibre sprouting are distinctive features of HS associated with epilepsies; they can be useful diagnostic aids to discriminate from other causes of HS, as well as highlighting potential mechanisms of hippocampal epileptogenesis. The cause of HS remains elusive and may be multifactorial; the contribution of febrile seizures, genetic susceptibility, inflammatory and neurodevelopmental factors are discussed. Post-mortem based research in HS, as an addition to studies on surgical samples, has the added advantage of enabling the study of the wider network changes associated with HS, the long-term effects of epilepsy on the pathology and associated comorbidities. It is likely that HS is heterogeneous in aspects of its cause, epileptogenetic mechanisms, network alterations and response to medical and surgical treatments. Future neuropathological studies will contribute to better recognition and understanding of these clinical and patho-aetiological subtypes of HS.
MeSH term(s)	Brain/pathology ; Epilepsy/pathology ; Epilepsy, Temporal Lobe/pathology ; Hippocampus/pathology ; Humans ; Sclerosis
Language	English
Publishing date	2014-04-24
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	80371-6
ISSN	1365-2990 ; 0305-1846
ISSN (online)	1365-2990
ISSN	0305-1846
DOI	10.1111/nan.12150
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Article ; Online: Review: Neuropathology findings in autonomic brain regions in SUDEP and future research directions.

Patodia, Smriti / Somani, Alyma / Thom, Maria

Autonomic neuroscience : basic & clinical

2021 Volume 235, Page(s) 102862

Abstract: Autonomic dysfunction is implicated from clinical, neuroimaging and experimental studies in sudden and unexpected death in epilepsy (SUDEP). Neuropathological analysis in SUDEP series enable exploration of acquired, seizure-related cellular adaptations ... ...

Abstract	Autonomic dysfunction is implicated from clinical, neuroimaging and experimental studies in sudden and unexpected death in epilepsy (SUDEP). Neuropathological analysis in SUDEP series enable exploration of acquired, seizure-related cellular adaptations in autonomic and brainstem autonomic centres of relevance to dysfunction in the peri-ictal period. Alterations in SUDEP compared to control groups have been identified in the ventrolateral medulla, amygdala, hippocampus and central autonomic regions. These involve neuropeptidergic, serotonergic and adenosine systems, as well as specific regional astroglial and microglial populations, as potential neuronal modulators, orchestrating autonomic dysfunction. Future research studies need to extend to clinically and genetically characterized epilepsies, to explore if common or distinct pathways of autonomic dysfunction mediate SUDEP. The ultimate objective of SUDEP research is the identification of disease biomarkers for at risk patients, to improve post-mortem recognition and disease categorisation, but ultimately, for exposing potential treatment targets of pharmacologically modifiable and reversible cellular alterations.
MeSH term(s)	Autonomic Nervous System ; Brain ; Death, Sudden ; Epilepsy ; Humans ; Sudden Unexpected Death in Epilepsy
Language	English
Publishing date	2021-07-31
Publishing country	Netherlands
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	2020105-9
ISSN	1872-7484 ; 1566-0702
ISSN (online)	1872-7484
ISSN	1566-0702
DOI	10.1016/j.autneu.2021.102862
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Article ; Online: Polyglucosan bodies in medullary catecholaminergic neurones in SUDEP.

Patodia, Smriti / Somani, Alyma / Thom, Maria

Epilepsy & behavior reports

2021 Volume 15, Page(s) 100430

Abstract: Polyglucosan bodies have been reported in the context of hypoxic-ischaemic perinatal brain injury, mainly in the pallidum but with rare reports in brainstem neurons. We report a case of a five-year-old boy with cerebral palsy and complex neurological ... ...

Abstract	Polyglucosan bodies have been reported in the context of hypoxic-ischaemic perinatal brain injury, mainly in the pallidum but with rare reports in brainstem neurons. We report a case of a five-year-old boy with cerebral palsy and complex neurological features including epilepsy who experienced sudden nocturnal death. At post-mortem long-standing bilateral necrosis of basal ganglia and hippocampal atrophy was identified in keeping with hypoxic-ischaemic perinatal injury. In addition numerous polyglucosan bodies, which were PAS, p62 and ubiquitin positive, were noted in brainstem neurones and dendrites, primarily involving the ventrolateral and dorsomedial medulla. Immunohistochemistry confirmed relative preservation of medullary neuronal populations in the reticular formation, including catecholaminergic (tyrosine hydroxylase, TH), serotonergic (tryptophan hydroxylase) and neurokinin1 receptor/somatostatin positive neurones. The polyglucosan bodies predominated in catecholaminergic neurones which could indicate their selective vulnerability and a functional deficiency, which during a critical peri-ictal period contributed to the sudden unexpected death in epilepsy.
Language	English
Publishing date	2021-01-28
Publishing country	United States
Document type	Case Reports
ISSN	2589-9864
ISSN (online)	2589-9864
DOI	10.1016/j.ebr.2021.100430
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Article: How to assess the accuracy of volume conduction models? A validation study with stereotactic EEG data.

Piastra, Maria Carla / Oostenveld, Robert / Homölle, Simon / Han, Biao / Chen, Qi / Oostendorp, Thom

Frontiers in human neuroscience

2024 Volume 18, Page(s) 1279183

Abstract: Introduction: Volume conduction models of the human head are used in various neuroscience fields, such as for source reconstruction in EEG and MEG, and for modeling the effects of brain stimulation. Numerous studies have quantified the accuracy and ... ...

Abstract	Introduction: Volume conduction models of the human head are used in various neuroscience fields, such as for source reconstruction in EEG and MEG, and for modeling the effects of brain stimulation. Numerous studies have quantified the accuracy and sensitivity of volume conduction models by analyzing the effects of the geometrical and electrical features of the head model, the sensor model, the source model, and the numerical method. Most studies are based on simulations as it is hard to obtain sufficiently detailed measurements to compare to models. The recording of stereotactic EEG during electric stimulation mapping provides an opportunity for such empirical validation. Methods: In the study presented here, we used the potential distribution of volume-conducted artifacts that are due to cortical stimulation to evaluate the accuracy of finite element method (FEM) volume conduction models. We adopted a widely used strategy for numerical comparison, i.e., we fixed the geometrical description of the head model and the mathematical method to perform simulations, and we gradually altered the head models, by increasing the level of detail of the conductivity profile. We compared the simulated potentials at different levels of refinement with the measured potentials in three epilepsy patients. Results: Our results show that increasing the level of detail of the volume conduction head model only marginally improves the accuracy of the simulated potentials when compared to Discussion: Our study suggests that commonly used strategies used to validate volume conduction models based solely on simulations might give an overly optimistic idea about volume conduction model accuracy. We recommend more empirical validations to be performed to identify those factors in volume conduction models that have the highest impact on the accuracy of simulated potentials. We share the dataset to allow researchers to further investigate the mismatch between measurements and FEM models and to contribute to improving volume conduction models.
Language	English
Publishing date	2024-02-12
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2425477-0
ISSN	1662-5161
ISSN	1662-5161
DOI	10.3389/fnhum.2024.1279183
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