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  1. Article ; Conference proceedings: Secondary Trigeminal Neuralgia Caused by Meningiomas Involving the Meckel’s Cave and Microsurgical Decompression

    Byeon, Yukyeng / Lee, Chaejin / Song, Sang Woo / Kim, Young-Hoon / Hong, Chang-Ki / Kim, Jeong Hoon

    Journal of Neurological Surgery Part B: Skull Base

    2024  Volume 85, Issue S 01

    Event/congress 33rd Annual Meeting North American Skull Base Society, Atlanta Marriott Marquis Atlanta, Georgia, United States, 2024-02-16
    Language English
    Publishing date 2024-02-01
    Publisher Georg Thieme Verlag KG
    Publishing place Stuttgart ; New York
    Document type Article ; Conference proceedings
    ZDB-ID 2654269-9
    ISSN 2193-634X ; 2193-6331
    ISSN (online) 2193-634X
    ISSN 2193-6331
    DOI 10.1055/s-0044-1780139
    Database Thieme publisher's database

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3425: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  2. Article: Freehand Placement of the C1 Pedicle Screw Using Direct Visualization of the Pedicle Anatomy and Serial Dilatation.

    Byeon, Yukyeng / Lee, Byung-Jou / Park, Jin Hoon

    Korean journal of neurotrauma

    2020  Volume 16, Issue 2, Page(s) 207–215

    Abstract: Objective: We designed a method for inserting C1 pedicle screws using the direct visualization technique of the pedicle and serial dilatation technique to reduce complications and malposition of screw, and assessed the accuracy of this method.: ... ...

    Abstract Objective: We designed a method for inserting C1 pedicle screws using the direct visualization technique of the pedicle and serial dilatation technique to reduce complications and malposition of screw, and assessed the accuracy of this method.
    Methods: Free-hand C1 pedicle screw insertion using the direct visualization technique of the pedicle and serial dilatation technique was performed on 5 consecutive patients with C1-2 instability at a single institute from March to December 2018. The method involved protecting the vertebral artery (VA) and C1 root using the Penfield No. 1, securing the entry point of the posterior arch screw and the pedicle was visible directly in Trendelenburg position. The hole at the entry point of the C1 posterior arch was serially dilated using a 2.5×3.0 mm drill bit, and the C1 pedicle screw was inserted with the free hand technique. We measured postoperative radiological parameters and recorded intraoperative complications, postoperative neurological deficits and the occurrence of occipital neuralgia. Postoperative computed tomography (CT) was performed to check screw malposition or construction failure.
    Results: Of the 10 C1 pedicle screws on postoperative CT, 20% of screws (grade A) were in the ideal position while 80% of screws (grade B) occupied a safe position. Overall, 100% of screws were safe (grade A or B). There were no iatrogenic neurological deficits, VA injury.
    Conclusion: Freehand placement of the C1 pedicle screw through the direct visualization technique of the pedicle and serial dilatation technique is safe and effective without intraoperative fluoroscopy guidance.
    Language English
    Publishing date 2020-05-21
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 3028579-3
    ISSN 2288-2243 ; 2234-8999
    ISSN (online) 2288-2243
    ISSN 2234-8999
    DOI 10.13004/kjnt.2020.16.e15
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: A Ruptured lenticulostriate artery aneurysm in moyamoya disease treated with Onyx embolization.

    Byeon, Yukyeng / Kim, Hong Bum / You, Seung Hoon / Yang, Kuhyun

    Journal of cerebrovascular and endovascular neurosurgery

    2021  Volume 24, Issue 2, Page(s) 154–159

    Abstract: Lenticulostriate artery (LSA) aneurysms are uncommon. Here, we report one case of ruptured LSA aneurysm which is related to Moyamoya disease (MMD). Surgical treatment of this aneurysm is challenging because of its deep location and complex neural ... ...

    Abstract Lenticulostriate artery (LSA) aneurysms are uncommon. Here, we report one case of ruptured LSA aneurysm which is related to Moyamoya disease (MMD). Surgical treatment of this aneurysm is challenging because of its deep location and complex neural structures around the LSA. We report one case treated with endovascular Onyx embolization, successfully and review LSA aneurysm associated with MMD.
    Language English
    Publishing date 2021-10-26
    Publishing country Korea (South)
    Document type Case Reports
    ISSN 2234-8565
    ISSN 2234-8565
    DOI 10.7461/jcen.2021.E2021.06.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Exploring prognostic factors and treatment strategies for long-term survival in pleomorphic xanthoastrocytoma patients.

    Lee, Chaejin / Byeon, Yukyeng / Kim, Gung Ju / Jeon, Juhee / Hong, Chang Ki / Kim, Jeong Hoon / Kim, Young-Hoon / Cho, Young Hyun / Hong, Seok Ho / Chong, Sang Joon / Song, Sang Woo

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 4615

    Abstract: Pleomorphic xanthoastrocytomas (PXA) are rare, accounting for < 1% of all astrocytomas. Literature on the clinical course and treatment outcomes of PXAs is limited. The study aimed to determine prognosis and treatment strategies for PXAs. Patients who ... ...

    Abstract Pleomorphic xanthoastrocytomas (PXA) are rare, accounting for < 1% of all astrocytomas. Literature on the clinical course and treatment outcomes of PXAs is limited. The study aimed to determine prognosis and treatment strategies for PXAs. Patients who had PXAs surgery between 2000-2021 were retrospectively analyzed for demographics and radiological characteristics. Initial and salvage treatment outcomes were recorded. Overall, 40 and 9 patients had grade 2 and 3 PXAs; their 5-year progression-free survival (PFS) rates were 75.8% and 37.0%, respectively (p = 0.003). Univariate analysis revealed that strong T1 enhancement (p = 0.036), infiltrative tumor margins (p < 0.001), peritumoral edema (p = 0.003), WHO grade (p = 0.005), and gross total resection (p = 0.005) affected the PFS. Multivariate analysis revealed that the WHO grade (p = 0.010) and infiltrative tumor margins (p = 0.008) influenced the PFS. The WHO grade (p = 0.027) and infiltrative tumor margins (p = 0.027) also affected the overall survival (OS). Subgroup analysis for grade 2 PXAs revealed no significant associations between adjuvant radiation therapy and the PFS and OS. This study highlighted the heterogeneous nature of PXAs and its impact on patient prognosis. Infiltrative tumor margins emerged as a key prognostic factor. Our findings have emphasized the prognostic relevance of radiological features and the need for larger studies on comprehensive management.
    MeSH term(s) Humans ; Prognosis ; Retrospective Studies ; Brain Neoplasms/pathology ; Astrocytoma/diagnostic imaging ; Astrocytoma/therapy ; Astrocytoma/pathology ; Treatment Outcome
    Language English
    Publishing date 2024-02-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-55202-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Surgical Strategy for Petroclival Meningioma-Related Trigeminal Neuralgia: The Role of Porus Trigeminus Opening.

    Byeon, Yukyeng / Lee, Chaejin / Jeon, Juhee / Kim, Gung Ju / Chong, Sangjoon / Hong, Seok Ho / Cho, Young Hyun / Kim, Young-Hoon / Kim, Jeong Hoon / Hong, Chang-Ki / Song, Sang Woo

    World neurosurgery

    2024  

    Abstract: Objective: Petroclival meningiomas invade Meckel's cave through the porus trigeminus, leading to secondary trigeminal neuralgia. Microsurgery and stereotactic radiosurgery (SRS) are the typical treatment options. This study investigated symptom control, ...

    Abstract Objective: Petroclival meningiomas invade Meckel's cave through the porus trigeminus, leading to secondary trigeminal neuralgia. Microsurgery and stereotactic radiosurgery (SRS) are the typical treatment options. This study investigated symptom control, outcomes, and surgical strategies for PC meningioma-induced TN.
    Methods: We retrospectively analyzed 28 TN patients with PC meningiomas who underwent microsurgical nerve decompression between January 2021 and February 2023. In all patients undergoing a transpetrosal approach, the porus trigeminus was opened to enable the removal of the entire tumor within Meckel's cave. Clinical outcomes were assessed using the Barrow Neurologic Institute (BNI) pain intensity scale. Risk factors for poor TN outcomes and poor facial numbness were analyzed.
    Results: Among 28 patients, 21 (75%) underwent the transpetrosal approach, 5 (17.9%) underwent the retrosigmoid approach, and 2 (7.1%) underwent the Dolenc approach. Following microsurgery, 23 patients (82.1%) experienced TN relief without further medication (BNI I or II). TN recurrence occurred in 2 patients (7.1%), and 3 patients (10.7%) did not achieve TN relief. Cavernous sinus invasion was significantly correlated with poor TN outcomes (P = 0.047). A history of previous SRS (P = 0.011) and upper clivus type tumor (P = 0.018) were significantly associated with poor facial numbness.
    Conclusions: Microsurgical nerve decompression is effective in improving BNI scores in patients with TN associated with PC meningiomas. Considering the results of our study, the opening of the porus trigeminus can be considered as a suggested procedure in the treatment of PC meningiomas, especially in cases accompanied by TN.
    Language English
    Publishing date 2024-03-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2024.03.069
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1159: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: Vestibular schwannoma associated with neurofibromatosis type 2: Clinical course following stereotactic radiosurgery.

    Kim, Junhyung / Byeon, Yukyeng / Song, Sang Woo / Cho, Young Hyun / Hong, Chang-Ki / Hong, Seok Ho / Kim, Jeong Hoon / Lee, Do Heui / Park, Ji Eun / Kim, Ho Sung / Kim, Young-Hoon

    Frontiers in oncology

    2022  Volume 12, Page(s) 996186

    Abstract: Objective: A lack of understanding of the clinical course of neurofibromatosis type 2 (NF2)-associated vestibular schwannoma (VS) often complicates the decision-making in terms of optimal timing and mode of treatment. We investigated the outcomes of ... ...

    Abstract Objective: A lack of understanding of the clinical course of neurofibromatosis type 2 (NF2)-associated vestibular schwannoma (VS) often complicates the decision-making in terms of optimal timing and mode of treatment. We investigated the outcomes of stereotactic radiosurgery (SRS) in this population.
    Methods: We retrospectively analyzed NF2 patients treated with Gamma-Knife SRS for VS in our tertiary referral center. A total of 41 treated lesions from 33 patients were collected with a follow-up period of 69.1 (45.0-104.8) months. We reviewed the treatment history, hearing function, and other treatment-related morbidities in individual cases. We also analyzed pre- and post-treatment tumor volumes
    Results: Most treated lesions showed effective tumor control up to 85% at 60 months after SRS, whereas unirradiated lesions progressed with a relative volume increase of 14.0% (7.8-27.0) per year during the observation period. Twelve (29%) cases showed pseudoprogression with significant volume expansion in the early follow-up period, which practically reduced the rate of tumor control to 57% at 24 months. Among the patients with serviceable hearing, two (20%) cases lost the hearing function on the treated side during the early follow-up period within 24 months.
    Conclusions: Progressive NF2-associated VS can be adequately controlled by SRS but the short-term effects of this treatment are not highly advantageous in terms of preserving hearing function. SRS treatment candidates should therefore be carefully selected.
    Language English
    Publishing date 2022-09-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2649216-7
    ISSN 2234-943X
    ISSN 2234-943X
    DOI 10.3389/fonc.2022.996186
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: An accessory belly of the sternothyroid muscle on the anterior neck.

    Kang, Dong Wan / Byeon, Yukyeng / Yoon, Sang Pil

    Surgical and radiologic anatomy : SRA

    2014  Volume 37, Issue 2, Page(s) 215–217

    Abstract: Purpose: Although anatomical variations were continuously found in the infrahyoid muscles, muscular variations of the sternothyroid muscle are still rare.: Materials and methods: We found an accessory belly of the sternothyroid muscle in a 46-year- ... ...

    Abstract Purpose: Although anatomical variations were continuously found in the infrahyoid muscles, muscular variations of the sternothyroid muscle are still rare.
    Materials and methods: We found an accessory belly of the sternothyroid muscle in a 46-year-old Korean male cadaver during routine dissection course, whose cause of death was 'chronic renal failure'.
    Results: The accessory belly attached to the oblique line of the lamina of the thyroid cartilage, covered the thyroid gland anteriorly, and attached to posterior surface of left sternothyroid muscle and pretracheal layer of the cervical fascia from side to side. It was supplied by the inferior thyroid artery from the left thyrocervical trunk and innervated by the nerve to sternothyroid muscle from the left ansa cervicalis.
    Conclusion: The present case is worth because it requires special attention performing procedures on the anterior neck.
    MeSH term(s) Cadaver ; Dissection ; Humans ; Male ; Middle Aged ; Neck Muscles/abnormalities
    Language English
    Publishing date 2014-04-17
    Publishing country Germany
    Document type Case Reports ; Journal Article
    ZDB-ID 632839-8
    ISSN 1279-8517 ; 0930-312X ; 0930-1038
    ISSN (online) 1279-8517
    ISSN 0930-312X ; 0930-1038
    DOI 10.1007/s00276-014-1295-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1456: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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