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1. Epidemiology and Comparative Analysis of Outcomes of Intramedullary Spinal Cord Tumor Between Pediatric and Adult Patients

Author

Umebayashi, Daisuke, Naito, Kentaro, Kurokawa, Ryu, Endo, Toshiki, Mizuno, Masaki, Hoshimaru, Minoru, Kim, Phyo, Hida, Kazutoshi, Takami, Toshihiro, Hara, Masahito, Aoyama, Masahiro, Sugawara, Taku, Shimizu, Hiroaki, Ogihara, Kotaro, Sugawara, Atsushi, Itoki, Kazushige, Matsui, Seiji, Shigekawa, Seiji, Kunihiro, Noritsugu, Yamamoto, Shinji, Yasuhara, Takao, Iwasaki, Motoyuki, Ueda, Shigeo, Miyoshi, Yasuyuki, Hayashi, Hideki, Noriyuki, Nakayama, Iwama, Toru, Nakagawa, Hiroshi, Sumiyoshi, Manabu, Hijikata, Yasukazu, Uchikado, Hisaaki, Fukuda, Hitoshi, Nakai, Tomoaki, Sasayama, Takashi, Mishima, Kazuhiko, Inoue, Tomoo, Yano, Shunsuke, Sasamori, Toru, Mikuni, Nobuhiro, Akiyama, Yukinori, Hara, Tsuyoshi, Gondo, Gakuji, Yoshida, Mitsuhiro, Komatani, Hideki, Takahashi, Yuichi, Ito, Kiyoshi, Goto, Hisaharu, Yasuhiro, Node, Watanabe, Mizuki, Ito, Yasunobu, Hirano, Yoshitaka, Tominaga, Teiji, Takami, Hirokazu, Karakama, Jun, Ohashi, Hiroki, Harada, Naoyuki, Shingo, Tetsuro, Kawajiri, Satoshi, Yamauchi, Tomohiro, Uno, Tetsuji, Takai, Keisuke, Fujimoto, So, Otake, Yasufumi, Takeshima, Yasuhiro, Nakase, Hiroyuki, Saito, Akihiko, Morimoto, Daijiro, Kim, Kyongsong, Ohtonari, Tatsuya, Kageyama, Hiroto, Mitsuhara, Takafumi, Kuromi, Yosuke, Takahashi, Toshiyuki, Kanematsu, Ryo, Inoue, Tatsushi, Muto, Jun, Seki, Toshitaka, Yamazaki, Kazuyoshi, Koyanagi, Izumi, Yoshifuji, Kazuhisa, Fujimoto, Masashi, Nishikawa, Misao, Yagi, Takashi, Kinouchi, Hiroyuki, Murata, Hidetoshi, and Kitayama, Mari

Published
2024
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2. Surgical and Endovascular Treatments for Asymptomatic Arteriovenous Fistulas at the Craniocervical Junction: A Multicenter Study

Author

Ito, Keisuke, Iwasaki, Motoyuki, Uchikado, Hisaaki, Umebayashi, Daisuke, Otsuka, Munehiro, Ohtonari, Tatsuya, Oda, Junpei, Kageyama, Hiroto, Kurokawa, Ryu, Koyanagi, Izumi, Koizumi, Satoshi, Sugawara, Taku, Takeshima, Yasuhiro, Nagashima, Yoshitaka, Nishikawa, Misao, Fujimoto, Masashi, Honda, Fumiaki, Matsui, Seishi, Matsumoto, Yoshihisa, Mitsuhara, Takafumi, Miyoshi, Yasuyuki, Murata, Hidetoshi, Yasuhara, Takao, Yamahata, Hitoshi, Yamamoto, Shinji, Inoue, Tomoo, Endo, Toshiki, Takai, Keisuke, and Seki, Toshitaka

Published
2023
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3. Epidemiology and Comparative Analysis of Outcomes of Intramedullary Spinal Cord Tumor Between Pediatric and Adult Patients

Author

Umebayashi, Daisuke, Naito, Kentaro, Kurokawa, Ryu, Endo, Toshiki, Mizuno, Masaki, Hoshimaru, Minoru, Kim, Phyo, Hida, Kazutoshi, Takami, Toshihiro, Hara, Masahito, Aoyama, Masahiro, Sugawara, Taku, Shimizu, Hiroaki, Ogihara, Kotaro, Sugawara, Atsushi, Itoki, Kazushige, Matsui, Seiji, Shigekawa, Seiji, Kunihiro, Noritsugu, Yamamoto, Shinji, Yasuhara, Takao, Iwasaki, Motoyuki, Ueda, Shigeo, Miyoshi, Yasuyuki, Hayashi, Hideki, Noriyuki, Nakayama, Iwama, Toru, Nakagawa, Hiroshi, Sumiyoshi, Manabu, Hijikata, Yasukazu, Uchikado, Hisaaki, Fukuda, Hitoshi, Nakai, Tomoaki, Sasayama, Takashi, Mishima, Kazuhiko, Inoue, Tomoo, Yano, Shunsuke, Sasamori, Toru, Mikuni, Nobuhiro, Akiyama, Yukinori, Hara, Tsuyoshi, Gondo, Gakuji, Yoshida, Mitsuhiro, Komatani, Hideki, Takahashi, Yuichi, Ito, Kiyoshi, Goto, Hisaharu, Yasuhiro, Node, Watanabe, Mizuki, Ito, Yasunobu, Hirano, Yoshitaka, Tominaga, Teiji, Takami, Hirokazu, Karakama, Jun, Ohashi, Hiroki, Harada, Naoyuki, Shingo, Tetsuro, Kawajiri, Satoshi, Yamauchi, Tomohiro, Uno, Tetsuji, Takai, Keisuke, Fujimoto, So, Otake, Yasufumi, Takeshima, Yasuhiro, Nakase, Hiroyuki, Saito, Akihiko, Morimoto, Daijiro, Kim, Kyongsong, Ohtonari, Tatsuya, Kageyama, Hiroto, Mitsuhara, Takafumi, Kuromi, Yosuke, Takahashi, Toshiyuki, Kanematsu, Ryo, Inoue, Tatsushi, Muto, Jun, Seki, Toshitaka, Yamazaki, Kazuyoshi, Koyanagi, Izumi, Yoshifuji, Kazuhisa, Fujimoto, Masashi, Nishikawa, Misao, Yagi, Takashi, Kinouchi, Hiroyuki, Murata, Hidetoshi, and Kitayama, Mari

Published
2023
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5. Application and Advantages of the Trans-Unco-Discal (TUD) Approach for Cervical Spondylotic Myelopathy and Radiculopathy: Classification and Modification of Surgical Technique Based on the Location of Spinal Cord and/or Nerve Root Compression.

Author

Nishikawa, Misao, Naito, Kentaro, Yoshimura, Masaki, Yamagata, Toru, Iseda, Keiichi, Hara, Mitsuhiro, Ikuno, Hiromichi, Ohata, Kenji, and Goto, Takeo

Subjects
*CERVICAL spondylotic myelopathy, *SPINAL cord, *OPERATIVE surgery, *RADICULOPATHY, *SPINAL surgery
Abstract

Purpose: We assess the application and advantages of modifying the trans-unco-discal (TUD) approach which we underwent for cervical myelo-radiculopathy. We present the surgical techniques of the modified TUD approach. Materials and Methods: The material was 180 cases where anterior cervical decompression (ACD) was performed by the modified TUD approach. We classified the material into four groups based on the location of the nerve root and/or spinal cord compression: I, compression of the root at intervertebral foramen (IVF); II, compression of the posterior margin of the vertebral body; III, compression of the IVF and posterior margin of the vertebral body; IV, compression of the bilateral IVF and posterior margin of the vertebral body. We applied the modified TUD approach to these four types. We present the surgical procedures and techniques for the modified TUD approach. The Japanese orthopedic association (JOA) score and neuroradiological alignment were examined. Results: The improvement rate of the JOA score was 78.4% at 6 months post-surgery and 77.5% in the most recent examinations. By the modified TUD approach, compressive lesions of the spinal cord and/or nerve roots were removed, and good alignment was acquired and sustained. Conclusions: ACD by the modified TUD approach safely achieved appropriate decompression for the spinal cord and/or nerve roots, and the patients had a high improvement rate and good alignment. Complications were less common than with other surgical procedures. If the TUD approach and endoscopic approaches can be combined, their application to new area is anticipated. [ABSTRACT FROM AUTHOR]

Published
2024
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8. The Symptomatic Calcification and Ossification of the Ligamentum Flavum in the Spine: Our Experience and Review of the Literature.

Author

Nishikawa, Misao, Yoshimura, Masaki, Naito, Kentaro, Yamagata, Toru, Goto, Hiroyuki, Hara, Mitsuhiro, Ikuno, Hiromichi, and Goto, Takeo

Subjects
*LITERATURE reviews, *OSSIFICATION, *CALCIFICATION, *SPINAL cord compression, *SPINE
Abstract

Introduction: We report our experience regarding the clinical features and pathological findings of the calcification of the ligamentum flavum (CLF) and ossification of the ligamentum flavum (OLF) in the spine. In addition, we reviewed the previous studies on CLF and OLF to enhance the understanding of these conditions. Materials and Methods: We compared the clinical, radiological, and histopathological features of CLF and OLF. Results: In CLF, a computed tomography (CT) scan showed egg-shaped or speck-like calcification in the ligamentum flavum. Magnetic resonance (MR) imaging demonstrated spinal cord compression due to a thickened ligamentum flavum, which appeared as a low-intensity mass. Pathological findings demonstrated fused islands of calcification resembling sand-like calcification. In OLF, CT showed beak-like ossification extending into the intervertebral foramen. MR imaging demonstrated spinal cord compression by a low-intensity mass. Pathological findings revealed laminar ossification of LF with chondrocytes near the calcification and laminar hyaline cartilage. Conclusions: CLF and OLF appear to be distinct entities based on their clinical, neuroradiological, histopathological, and pathogenetic features. We suggest that the causes of CLF include both metabolic and dystrophic factors, while the pathogenesis of OLF is characterized by enchondral ossification induced by a genetic cascade triggered by shearing/tension stress. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Surgical and endovascular treatments for asymptomatic arteriovenous fistulas at the craniocervical junction: A multicenter study.

Author

Inoue, Tomoo, primary, Endo, Toshiki, additional, Takai, Keisuke, additional, Seki, Toshitaka, additional, Ito, Keisuke, additional, Iwasaki, Motoyuki, additional, Uchikado, Hisaaki, additional, Umebayashi, Daisuke, additional, Otsuka, Munehiro, additional, Ohtonari, Tatsuya, additional, Oda, Junpei, additional, Kageyama, Hiroto, additional, Kurokawa, Ryu, additional, Koyanagi, Izumi, additional, Koizumi, Satoshi, additional, Sugawara, Taku, additional, Takeshima, Yasuhiro, additional, Nagashima, Yoshitaka, additional, Nishikawa, Misao, additional, Fujimoto, Masashi, additional, Honda, Fumiaki, additional, Matsui, Seishi, additional, Matsumoto, Yoshihisa, additional, Mitsuhara, Takafumi, additional, Miyoshi, Yasuyuki, additional, Murata, Hidetoshi, additional, Yasuhara, Takao, additional, Yamahata, Hitoshi, additional, and Yamamoto, Shinji, additional

Published
2023
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10. Predictors of Progression-Free Survival in Patients With Spinal Intramedullary Ependymoma: A Multicenter Retrospective Study by the Neurospinal Society of Japan

Author

Naito, Kentaro, Umebayashi, Daisuke, Kurokawa, Ryu, Endo, Toshiki, Mizuno, Masaki, Hoshimaru, Minoru, Kim, Phyo, Hida, Kazutoshi, Takami, Toshihiro, Hara, Masahito, Aoyama, Masahiro, Sugawara, Taku, Shimizu, Hiroaki, Ogihara, Kotaro, Sugawara, Atsushi, Itoki, Kazushige, Matsui, Seiji, Shigekawa, Seiji, Kunihiro, Noritsugu, Yamamoto, Shinji, Yasuhara, Takao, Iwasaki, Motoyuki, Ueda, Shigeo, Miyoshi, Yasuyuki, Hayashi, Hideki, Noriyuki, Nakayama, Iwama, Toru, Nakagawa, Hiroshi, Sumiyoshi, Manabu, Hijikata, Yasukazu, Uchikado, Hisaaki, Fukuda, Hitoshi, Nakai, Tomoaki, Sasayama, Takashi, Mishima, Kazuhiko, Inoue, Tomoo, Yano, Shunsuke, Sasamori, Toru, Mikuni, Nobuhiro, Akiyama, Yukinori, Hara, Tsuyoshi, Gondo, Gakuji, Yoshida, Mitsuhiro, Komatani, Hideki, Takahashi, Yuichi, Ito, Kiyoshi, Goto, Hisaharu, Yasuhiro, Node, Watanabe, Mizuki, Ito, Yasunobu, Hirano, Yoshitaka, Tominaga, Teiji, Takami, Hirokazu, Karakama, Jun, Ohashi, Hiroki, Harada, Naoyuki, Shingo, Tetsuro, Kawajiri, Satoshi, Yamauchi, Tomohiro, Uno, Tetsuji, Takai, Keisuke, Fujimoto, So, Otake, Yasufumi, Takeshima, Yasuhiro, Nakase, Hiroyuki, Saito, Akihiko, Morimoto, Daijiro, Kim, Kyongsong, Ohtonari, Tatsuya, Kageyama, Hiroto, Mitsuhara, Takafumi, Kuromi, Yosuke, Takahashi, Toshiyuki, Kanematsu, Ryo, Inoue, Tatsushi, Seki, Toshitaka, Yamazaki, Kazuyoshi, Koyanagi, Izumi, Yoshifuji, Kazuhisa, Fujimoto, Masashi, Nishikawa, Misao, Yagi, Takashi, Kinouchi, Hiroyuki, Murata, Hidetoshi, and Kitayama, Mari

Published
2023
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14. Ischemic complications in the neurosurgical and endovascular treatments of craniocervical junction arteriovenous fistulas: a multicenter study

Author

Takai, Keisuke, primary, Endo, Toshiki, additional, Seki, Toshitaka, additional, Inoue, Tomoo, additional, Koyanagi, Izumi, additional, Mitsuhara, Takafumi, additional, _, _, additional, Ito, Keisuke, additional, Iwasaki, Motoyuki, additional, Uchikado, Hisaaki, additional, Umebayashi, Daisuke, additional, Otsuka, Munehiro, additional, Ohtonari, Tatsuya, additional, Oda, Junpei, additional, Kageyama, Hiroto, additional, Kurokawa, Ryu, additional, Koizumi, Satoshi, additional, Sugawara, Taku, additional, Takeshima, Yasuhiro, additional, Nagashima, Yoshitaka, additional, Nishikawa, Misao, additional, Fujimoto, Masashi, additional, Honda, Fumiaki, additional, Matsui, Seishi, additional, Matsumoto, Yoshihisa, additional, Miyoshi, Yasuyuki, additional, Murata, Hidetoshi, additional, Yasuhara, Takao, additional, Yamahata, Hitoshi, additional, Yamamoto, Shinji, additional, and Yamamoto, Yu, additional

Published
2022
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17. Neurosurgical versus endovascular treatment of craniocervical junction arteriovenous fistulas: a multicenter cohort study of 97 patients

Author

Takai, Keisuke, primary, Endo, Toshiki, additional, Seki, Toshitaka, additional, Inoue, Tomoo, additional, Koyanagi, Izumi, additional, Mitsuhara, Takafumi, additional, _, _, additional, Ito, Keisuke, additional, Iwasaki, Motoyuki, additional, Uchikado, Hisaaki, additional, Umebayashi, Daisuke, additional, Otsuka, Munehiro, additional, Ohtonari, Tatsuya, additional, Oda, Junpei, additional, Kageyama, Hiroto, additional, Kurokawa, Ryu, additional, Koizumi, Satoshi, additional, Sugawara, Taku, additional, Takeshima, Yasuhiro, additional, Nagashima, Yoshitaka, additional, Nishikawa, Misao, additional, Fujimoto, Masashi, additional, Honda, Fumiaki, additional, Matsui, Seishi, additional, Matsumoto, Yoshihisa, additional, Miyoshi, Yasuyuki, additional, Murata, Hidetoshi, additional, Yasuhara, Takao, additional, Yamahata, Hitoshi, additional, Yamamoto, Shinji, additional, and Yamamoto, Yu, additional

Published
2022
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18. Congestive myelopathy due to craniocervical junction arteriovenous fistulas mimicking transverse myelitis: a multicenter study on 27 cases.

Author

Takai, Keisuke, Endo, Toshiki, Seki, Toshitaka, Inoue, Tomoo, the Neurospinal Society of Japan CCJAVF Study Investigators, Ito, Keisuke, Iwasaki, Motoyuki, Uchikado, Hisaaki, Umebayashi, Daisuke, Otsuka, Munehiro, Ohtonari, Tatsuya, Oda, Junpei, Kageyama, Hiroto, Kurokawa, Ryu, Koyanagi, Izumi, Koizumi, Satoshi, Sugawara, Taku, Takeshima, Yasuhiro, Nagashima, Yoshitaka, and Nishikawa, Misao

Subjects
TRANSVERSE myelitis, CRANIOVERTEBRAL junction, ARTERIOVENOUS fistula, CERVICAL spondylotic myelopathy, SPINAL cord diseases, CERVICAL cord
Abstract

Background: The purpose was to clarify diagnostic clues and pitfalls in cranio-cervical junction arteriovenous fistulas (CCJ AVFs) with congestive myelopathy. Methods: In a multicenter observational study by the Neurospinal Society of Japan, we described the demographics, clinical courses, imaging findings, and outcomes of consecutive patients with CCJ AVFs presenting with congestive myelopathy between 2009 and 2019. Results: Twenty-seven patients were included (mean age, 70 years; male, 96%). Progressive symptoms within one day to one month were more common (63%) than chronic symptoms. Myelopathic symptoms were characterized by ascending paralysis beginning from the legs, involving the trunk and arms, and sometimes ending in the brainstem. Fifteen patients (56%) received a misdiagnosis, including acute transverse myelitis. The most common MRI findings were venous congestive edema of the cervical cord (96%) and the brainstem (63%) and surrounding vascular flow voids (100%). The mean extension of congestive edema was 5.5 ± 2.9 vertebral segments. The most common angiographic findings were a dural AVF (78%) at the C1 level (81%) with descending venous drainage (85%). Seven patients (26%) were administered steroids, which resulted in neurological decline in 3. Neurosurgical obliteration of the AVF led to improvements in MRI findings in 75% and a functional status in 67%; however, 44% remained dependent. Conclusions: The myelopathy of CCJ AVFs was characterized by acute ascending paralysis in elderly men. A misdiagnosis was common because of the acute presentation due to a longitudinally extensive spinal cord lesion. Dilated vessels on MRI were a key finding for the correct diagnosis. What is already known on this topic? Slowly progressive myelopathy is a well-known symptom that results from impaired spinal venous drainage due to thoracolumbar AVFs. Although cranio-cervical junction arteriovenous fistulas (CCJ AVFs) constitute a treatable cause of congestive myelopathy, detailed information is not currently available due to their rarity. What does this study add? CCJ AVFs often presented with acute ascending myelopathy in elderly men due to a longitudinally extending cervical cord lesion with surrounding flow voids. Steroid pulse therapy was not effective or even harmful to congestive myelopathy, while neurosurgical treatment effectively obliterated AVFs. How might this study affect research, practice or policy? The results obtained revealed diagnostic clues and pitfalls from the largest dataset of patients with CCJ AVFs in a multicenter cohort. [ABSTRACT FROM AUTHOR]

Published
2023
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20. Surgical Outcome in Lumbar Spinal Canal Stenosis, Spondylolisthesis and Instability for Elderly and Pre-elderly Patients―Recovery Rate of Neurological Symptoms, Perioperative Complications, Stabilization of Joints, and Bony Fusion―

Author

Kanzaki, Toshiyuki, primary, Ishino, Noboru, additional, Yamagata, Toru, additional, Miyoshi, Eisuke, additional, Koh, Saya, additional, Yamamoto, Naoki, additional, Katayama, Yuri, additional, Goto, Hiroyuki, additional, Ikuno, Hiromichi, additional, and Nishikawa, Misao, additional

Published
2022
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33. Pathogenesis and Classification of Chiari Malformation Type I Based on the Mechanism of Ptosis of the Brain Stem and Cerebellum: A Morphometric Study of the Posterior Cranial Fossa and Craniovertebral Junction.

Author

Nishikawa, Misao, Bolognese, Paolo A., Kula, Roger W., Ikuno, Hiromichi, and Ohata, Kenji

Subjects
*POSTERIOR cranial fossa, *ARNOLD-Chiari deformity, *BRAIN stem, *OCCIPITAL bone, *CEREBELLUM, *CRANIOVERTEBRAL junction
Abstract

Introduction  We investigated the mechanism of ptosis of the brain stem and cerebellum (hindbrain) in Chiari malformation type I (CM-I) and classified CM-I according to pathogenesis, based on a morphometric study of the posterior cranial fossa (PCF) and craniovertebral junction (CVJ). We discuss the appropriate surgical treatment for hindbrain ptosis. Materials and Methods  We examined 500 patients with CM-I and 100 healthy control individuals. We calculated the volume of the PCF (VPCF) and measured the axial length of the enchondral parts of the occipital bone and hindbrain. As statistical analyses, for the multiple analyses, heavy palindromic tests were used. Using three independent objective parameters, we tried to classify CM-I. Results  Three independent subtypes were confirmed (CM-I types A, B, and C). CM-I type A (167 cases): normal VPCF, normal volume of the area surrounding the foramen magnum (VSFM), and normal occipital bone size; CM-I type B (178 cases): normal VPCF, small VSFM, and small occipital bone size; and CM-I type C (155 cases): small VPCF, small VSFM, and small occipital bone size. Conclusions  Morphometric analyses of PCF and CVJ were very useful for the investigation of the mechanism of hindbrain ptosis and classifying CM-I according to pathogenesis. CM-I type A included mechanisms other than hindbrain ptosis, for example, CVJ instability, tethered cord, and increased intracranial pressure. CM-I types B and C demonstrated underdevelopment of the occipital bone. For CM-I types B and C, posterior decompression should be performed. For CM-I type A, appropriate surgical management should be selected. [ABSTRACT FROM AUTHOR]

Published
2021
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48. A 3.2-French Cerebral Diagnostic Catheter for All Ages: Technical Note

Author

Komiyama, Masaki, Nakajima, Hideki, Nishikawa, Misao, Yamanaka, Kazuhiro, Iwai, Yoshiyasu, and Yasui, Toshihiro

Subjects
Adult, Male, Interventional, Adolescent, Infant, Equipment Design, Middle Aged, Catheterization, Cerebral Angiography, Child, Preschool, Feasibility Studies, Humans, Female, Child, Aged
Abstract

Summary: We report our experience with a 3.2F cerebral diagnostic catheter system. Thirty patients (aged 6 months to 76 years) had undergone cerebral angiography. All targeted brachiocephalic vessels were catheterized except for one artery (98.9% success rate). The image quality obtained with the 3.2F catheter was judged to be comparable with that using the 4F catheter in all cases. This catheter system could be used for cerebral angiography as the standard for patients of all ages.

Published
2001

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