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  1. Article: Classification of subdural hematomas: proposal for a new system improving the ICD Coding Tools.

    Langlois, Anne-Marie / Touchette, Charles J / Mathieu, David / Iorio-Morin, Christian

    Frontiers in neurology

    2023  Volume 14, Page(s) 1244006

    Abstract: Background: The International Statistical Classification of Diseases (ICD) classifies subdural hematoma (SDH) as traumatic or non-traumatic. In clinical settings, however, SDH is typically described as either acute or chronic.: Objective: The goal of ...

    Abstract Background: The International Statistical Classification of Diseases (ICD) classifies subdural hematoma (SDH) as traumatic or non-traumatic. In clinical settings, however, SDH is typically described as either acute or chronic.
    Objective: The goal of this study was to assess how the ICD Coding Tools captures the clinical terminology and propose an improved classification that would increase the system's usefulness in administrative, statistical and research applications.
    Methods: We performed a retrospective analysis of patients who presented to our center with an ICD diagnostic code for either traumatic or non-traumatic SDH. A qualitative analysis of patients' charts was performed to identify elements relevant to management and prognosis, following which a meeting between expert investigators was held to elaborate a new classification of SDH. Imaging from all patients was then reviewed and cases were reclassified according to our proposed system.
    Results: A total of 277 SDH cases were included. Themes documented in the charts included chronicity, etiology, side, and symptoms. We created a new classification which distinguishes acute SDH (aSDH) from membrane-associated SDH (mSDH). aSDH were further divided into traumatic aSDH (taSDH) and non-traumatic aSDH (ntaSDH), while mSDH were divided into acute on chronic (a/cSDH), subacute (sSDH) and chronic (cSDH) categories.
    Conclusion: The ICD coding system correctly identifies taSDH and ntaSDH. However, it remains non-specific for mSDH. We propose this new SDH classification system to better capture chronicity and etiology - factors felt to impact management and prognosis.
    Language English
    Publishing date 2023-10-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2564214-5
    ISSN 1664-2295
    ISSN 1664-2295
    DOI 10.3389/fneur.2023.1244006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Letter to the Editor. Spreading depolarizations in chronic subdural hematoma.

    Iorio-Morin, Christian / Levesque, Mathieu

    Journal of neurosurgery

    2020  Volume 134, Issue 4, Page(s) 1346–1347

    MeSH term(s) Drainage ; Hematoma, Subdural, Chronic/diagnostic imaging ; Hematoma, Subdural, Chronic/surgery ; Humans
    Language English
    Publishing date 2020-07-31
    Publishing country United States
    Document type Journal Article ; Letter ; Comment
    ZDB-ID 3089-2
    ISSN 1933-0693 ; 0022-3085
    ISSN (online) 1933-0693
    ISSN 0022-3085
    DOI 10.3171/2020.6.JNS202185
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: In Reply: Nonepileptic, Stereotypical, and Intermittent Symptoms (NESIS) in Patients With Subdural Hematoma: Proposal for a New Clinical Entity With Therapeutic and Prognostic Implications.

    Iorio-Morin, Christian / Levesque, Mathieu

    Neurosurgery

    2020  Volume 86, Issue 5, Page(s) E485–E486

    MeSH term(s) Hematoma, Subdural, Chronic ; Humans ; Prognosis
    Language English
    Publishing date 2020-01-31
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 135446-2
    ISSN 1524-4040 ; 0148-396X
    ISSN (online) 1524-4040
    ISSN 0148-396X
    DOI 10.1093/neuros/nyaa013
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  4. Article ; Online: In Reply to the Letter to the Editor Regarding: "Other Apps Beyond WhatsApp".

    Bergeron, David / Iorio-Morin, Christian

    World neurosurgery

    2019  Volume 130, Page(s) 568

    MeSH term(s) Software
    Language English
    Publishing date 2019-09-30
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2019.06.167
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  5. Article ; Online: Perspective on the Homunculus, the History of Cerebral Localization, and Evolving Modes of Data Representation.

    Iorio-Morin, Christian / Mathieu, David

    World neurosurgery

    2019  Volume 135, Page(s) 42–47

    MeSH term(s) Brain Mapping ; Female ; Humans ; Neurosurgery
    Language English
    Publishing date 2019-11-26
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2019.11.104
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  6. Article: Superior Longitudinal Fasciculus: A Review of the Anatomical Descriptions With Functional Correlates.

    Janelle, Felix / Iorio-Morin, Christian / D'amour, Sabrina / Fortin, David

    Frontiers in neurology

    2022  Volume 13, Page(s) 794618

    Abstract: The superior longitudinal fasciculus (SLF) is part of the longitudinal association fiber system, which lays connections between the frontal lobe and other areas of the ipsilateral hemisphere. As a dominant association fiber bundle, it should correspond ... ...

    Abstract The superior longitudinal fasciculus (SLF) is part of the longitudinal association fiber system, which lays connections between the frontal lobe and other areas of the ipsilateral hemisphere. As a dominant association fiber bundle, it should correspond to a well-defined structure with a clear anatomical definition. However, this is not the case, and a lot of confusion and overlap surrounds this entity. In this review/opinion study, we survey relevant current literature on the topic and try to clarify the definition of SLF in each hemisphere. After a comparison of postmortem dissections and data obtained from diffusion MRI studies, we discuss the specifics of this bundle regarding its anatomical landmarks, differences in lateralization, as well as individual variability. We also discuss the confusion regarding the arcuate fasciculus in relation to the SLF. Finally, we recommend a nomenclature based on the findings exposed in this review and finalize with a discussion on relevant functional correlates of the structure.
    Language English
    Publishing date 2022-04-27
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2564214-5
    ISSN 1664-2295
    ISSN 1664-2295
    DOI 10.3389/fneur.2022.794618
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  7. Article ; Online: Gamma Knife Stereotactic Radiosurgery for Trigeminal Neuralgia Secondary to Multiple Sclerosis: A Case-Control Study.

    Leduc, William / Mathieu, David / Adam, Elizabeth / Ferreira, Raphaëlle / Iorio-Morin, Christian

    Neurosurgery

    2023  Volume 93, Issue 2, Page(s) 453–461

    Abstract: Background: The efficacy of stereotactic radiosurgery (SRS) for the relief of trigeminal neuralgia (TN) is well established. Much less is known, however, about the benefit of SRS for multiple sclerosis (MS)-related TN (MS-TN).: Objective: To compare ... ...

    Abstract Background: The efficacy of stereotactic radiosurgery (SRS) for the relief of trigeminal neuralgia (TN) is well established. Much less is known, however, about the benefit of SRS for multiple sclerosis (MS)-related TN (MS-TN).
    Objective: To compare outcomes in patients who underwent SRS for MS-TN vs classical/idiopathic TN and identify relative risk factors for failure.
    Methods: We conducted a retrospective, case-control study of patients who underwent Gamma Knife radiosurgery at our center for MS-TN between October 2004 and November 2017. Cases were matched 1:1 to controls using a propensity score predicting MS probability using pretreatment variables. The final cohort consisted of 154 patients (77 cases and 77 controls). Baseline demographics, pain characteristics, and MRI features were collected before treatment. Pain evolution and complications were obtained at follow-up. Outcomes were analyzed using the Kaplan-Meir estimator and Cox regressions.
    Results: There was no statistically significant difference between both groups with regards to initial pain relief (modified Barrow National Institute IIIa or less), which was achieved in 77% of patients with MS and 69% of controls. In responders, 78% of patients with MS and 52% of controls eventually had recurrence. Pain recurred earlier in patients with MS (29 months) than in controls (75 months). Complications were similarly distributed in each group and consisted, in the MS group, of 3% of new bothersome facial hypoesthesia and 1% of new dysesthesia.
    Conclusion: SRS is a safe and effective modality to achieve pain freedom in MS-TN. However, pain relief is significantly less durable than in matched controls without MS.
    MeSH term(s) Humans ; Trigeminal Neuralgia/diagnostic imaging ; Trigeminal Neuralgia/etiology ; Trigeminal Neuralgia/surgery ; Radiosurgery/adverse effects ; Retrospective Studies ; Treatment Outcome ; Case-Control Studies ; Multiple Sclerosis/complications ; Multiple Sclerosis/surgery ; Pain/surgery ; Follow-Up Studies
    Language English
    Publishing date 2023-03-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 135446-2
    ISSN 1524-4040 ; 0148-396X
    ISSN (online) 1524-4040
    ISSN 0148-396X
    DOI 10.1227/neu.0000000000002440
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    Zs.MO 539: Show issues

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  8. Article ; Online: Stereotactic Radiosurgery for Pineal Region Tumors.

    Mathieu, David / Iorio-Morin, Christian

    Progress in neurological surgery

    2019  Volume 34, Page(s) 173–183

    Abstract: Pineal region tumors represent a heterogeneous group of different histologic entities, for which the management can be a significant challenge, due to their critical location and frequent aggressive behavior. Traditional management includes surgical ... ...

    Abstract Pineal region tumors represent a heterogeneous group of different histologic entities, for which the management can be a significant challenge, due to their critical location and frequent aggressive behavior. Traditional management includes surgical resection, fractionated radiation therapy, and chemotherapy. Stereotactic radiosurgery (SRS) is being increasingly used in the treatment of these tumors. It is used as primary therapy for pineocytomas and papillary tumors of the pineal region, as an adjuvant radiation boost in combination with radiation or chemotherapy for pineoblastomas and germ cell tumors, or in the context of tumor recurrence. The reported morbidity is low, consisting in transient oculomotor disturbance in most cases. As a non-invasive alternative to microsurgical resection, SRS should always be considered when discussing these challenging cases.
    MeSH term(s) Brain Neoplasms/radiotherapy ; Brain Neoplasms/surgery ; Humans ; Neoplasm Recurrence, Local/radiotherapy ; Neoplasm Recurrence, Local/surgery ; Pineal Gland/pathology ; Pineal Gland/surgery ; Pinealoma/radiotherapy ; Pinealoma/surgery ; Radiosurgery/methods
    Language English
    Publishing date 2019-05-16
    Publishing country Switzerland
    Document type Journal Article ; Review
    ISSN 1662-3924 ; 0079-6492
    ISSN (online) 1662-3924
    ISSN 0079-6492
    DOI 10.1159/000493062
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  9. Article ; Online: Adoption of focused ultrasound thalamotomy for essential tremor: why so much fuss about FUS?

    Iorio-Morin, Christian / Hodaie, Mojgan / Lozano, Andres M

    Journal of neurology, neurosurgery, and psychiatry

    2021  Volume 92, Issue 5, Page(s) 549–554

    Abstract: Background: Focused ultrasound (FUS) was approved as a new treatment modality for essential tremor (ET) in 2016. The goal of this study was to quantify FUS adoption for ET and understand its drivers.: Methods: The adoption of the various surgical ... ...

    Abstract Background: Focused ultrasound (FUS) was approved as a new treatment modality for essential tremor (ET) in 2016. The goal of this study was to quantify FUS adoption for ET and understand its drivers.
    Methods: The adoption of the various surgical options for ET was estimated using three measures: the number of presentations on the various surgical treatments for ET at specialised international meetings, the number of original papers published as identified by literature searches and the number of thalamotomy procedures performed worldwide for ET as provided by device manufacturers' registries.
    Results: First, we found that the number of presentations related to lesioning procedures is increasing relative to deep brain stimulation (DBS) at international meetings. Second, there are already more publications on FUS (93) than stereotactic radiosurgery (SRS) (68) or radiofrequency (43) for ET, although they still lag behind DBS papers (750). Third, the number of annual FUS thalamotomies performed for ET (n>1200 in 2019) in 44 centres has surpassed the annual procedures across 342 Gamma Knife units (n<400, 2018) but is yet to reach the number of DBS cases for ET estimated at over 2400/year.
    Conclusion: FUS is being rapidly adopted for the treatment of ET. We hypothesise that its perceived minimally invasive nature coupled with the ability to perform intraoperative clinical assessments, its immediate effects and active marketing efforts are contributing factors. As lesioning modalities for the treatment of ET are reappraised, the superior popularity of FUS over SRS appears to arise for reasons other than differences in clinical outcomes.
    MeSH term(s) Essential Tremor/surgery ; Humans ; Thalamus/surgery ; Treatment Outcome ; Ultrasonography, Interventional/methods
    Language English
    Publishing date 2021-02-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 3087-9
    ISSN 1468-330X ; 0022-3050
    ISSN (online) 1468-330X
    ISSN 0022-3050
    DOI 10.1136/jnnp-2020-324061
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  10. Article: Deep-Brain Stimulation for Essential Tremor and Other Tremor Syndromes: A Narrative Review of Current Targets and Clinical Outcomes.

    Iorio-Morin, Christian / Fomenko, Anton / Kalia, Suneil K

    Brain sciences

    2020  Volume 10, Issue 12

    Abstract: Tremor is a prevalent symptom associated with multiple conditions, including essential tremor (ET), Parkinson's disease (PD), multiple sclerosis (MS), stroke and trauma. The surgical management of tremor evolved from stereotactic lesions to deep-brain ... ...

    Abstract Tremor is a prevalent symptom associated with multiple conditions, including essential tremor (ET), Parkinson's disease (PD), multiple sclerosis (MS), stroke and trauma. The surgical management of tremor evolved from stereotactic lesions to deep-brain stimulation (DBS), which allowed safe and reversible interference with specific neural networks. This paper reviews the current literature on DBS for tremor, starting with a detailed discussion of current tremor targets (ventral intermediate nucleus of the thalamus (Vim), prelemniscal radiations (Raprl), caudal zona incerta (Zi), thalamus (Vo) and subthalamic nucleus (STN)) and continuing with a discussion of results obtained when performing DBS in the various aforementioned tremor syndromes. Future directions for DBS research are then briefly discussed.
    Language English
    Publishing date 2020-12-01
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2651993-8
    ISSN 2076-3425
    ISSN 2076-3425
    DOI 10.3390/brainsci10120925
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