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2. 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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3. 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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4. 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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11. 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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12. 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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13. 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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14. 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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15. 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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18. Neurosurgical versus endovascular treatment of spinal dural arteriovenous fistulas: a multicenter study of 195 patients

Author

Takai, Keisuke, primary, Endo, Toshiki, additional, Yasuhara, Takao, additional, Seki, Toshitaka, additional, Watanabe, Kei, additional, Tanaka, Yuki, additional, Kurokawa, Ryu, additional, Kanaya, Hideaki, additional, Honda, Fumiaki, additional, Itabashi, Takashi, additional, Ishikawa, Osamu, additional, Murata, Hidetoshi, additional, Tanaka, Takahiro, additional, Nishimura, Yusuke, additional, Eguchi, Kaoru, additional, Takami, Toshihiro, additional, Watanabe, Yusuke, additional, Nishida, Takeo, additional, Hiramatsu, Masafumi, additional, Ohtonari, Tatsuya, additional, Yamaguchi, Satoshi, additional, Mitsuhara, Takafumi, additional, Matsui, Seishi, additional, Uchikado, Hisaaki, additional, Hattori, Gohsuke, additional, Yamahata, Hitoshi, additional, and Taniguchi, Makoto, additional

Published
2021
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21. Microsurgical versus endovascular treatment of spinal epidural arteriovenous fistulas with intradural venous drainage: a multicenter study of 81 patients

Author

Takai, Keisuke, primary, Endo, Toshiki, additional, Yasuhara, Takao, additional, Seki, Toshitaka, additional, Watanabe, Kei, additional, Tanaka, Yuki, additional, Kurokawa, Ryu, additional, Kanaya, Hideaki, additional, Honda, Fumiaki, additional, Itabashi, Takashi, additional, Ishikawa, Osamu, additional, Murata, Hidetoshi, additional, Tanaka, Takahiro, additional, Nishimura, Yusuke, additional, Eguchi, Kaoru, additional, Takami, Toshihiro, additional, Watanabe, Yusuke, additional, Nishida, Takeo, additional, Hiramatsu, Masafumi, additional, Ohtonari, Tatsuya, additional, Yamaguchi, Satoshi, additional, Mitsuhara, Takafumi, additional, Matsui, Seishi, additional, Uchikado, Hisaaki, additional, Hattori, Gohsuke, additional, Horie, Nobutaka, additional, Yamahata, Hitoshi, additional, and Taniguchi, Makoto, additional

Published
2020
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29. Contrast-less stent placement for vertebral artery origin stenosis.

Author

Ota, Shinzo, Sekihara, Yoshinobu, Himeno, Takahiro, Tanaka, Yasue, and Ohtonari, Tatsuya

Subjects
ARTERIAL stenosis treatment, VERTEBRAL artery, SURGICAL stents, CONTRAST media, FOLLOW-up studies (Medicine), DISEASES
Abstract

We performed stent placement under intravascular ultrasound (IVUS), without the use of contrast medium, in a male patient in his 70s who had vertebral artery origin stenosis and decreased renal function. Satisfactory dilatation was achieved without complications, and the patient remained asymptomatic at 2 years of follow-up. We now report the details of this procedure. Stent placement under IVUS guidance may be useful in patients in whom contrast medium is contraindicated. [ABSTRACT FROM AUTHOR]

Published
2017
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36. [What are the Criteria for Deciding Posterior Cervical Decompression with/without Fusion?]

Author

Ohtonari T

Subjects
Cervical Vertebrae diagnostic imaging, Cervical Vertebrae surgery, Decompression, Surgical, Humans, Laminectomy, Retrospective Studies, Treatment Outcome, Kyphosis diagnostic imaging, Kyphosis surgery, Laminoplasty, Spinal Cord Diseases, Spinal Fusion
Abstract

We herein report on the knowledge regarding posterior cervical decompression with or without posterior fusion mainly performed in patients with cervical spondylotic myelopathy in the past decade(2011-2020). In cases of preoperative cervical kyphosis >15° in the C2-7 Cobb angle, with a horizontal displacement >3 mm, and severe local kyphosis at an intervertebral space in dynamic lateral radiography, posterior fusion should be considered over laminoplasty. However, a short fusion may be sufficient in cases with apparent single local instability. Moreover, in cases with normal or mild kyphotic alignment compared to severe global cervical kyphosis, further development of laminoplasty or laminectomy aimed at the preservation and reconstruction of the posterior cervical structure is expected to maintain the alignment and avoid the unnecessary use of a spacer or mini-plate for the re-closure of the opened lamina in laminoplasty. A properly planned surgical strategy is mandatory in posterior cervical decompression. The choice of surgical procedure should not be based on a compelling motivation regarding familiarity with a surgical method or usage of implants but rather on the pathophysiology of myelopathy, age and sex of the patient, and the presence of osteoporosis, instability, or alignment.

Published
2021
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37. Neurosurgical versus endovascular treatment of spinal dural arteriovenous fistulas: a multicenter study of 195 patients.

Author

Takai K, Endo T, Yasuhara T, Seki T, Watanabe K, Tanaka Y, Kurokawa R, Kanaya H, Honda F, Itabashi T, Ishikawa O, Murata H, Tanaka T, Nishimura Y, Eguchi K, Takami T, Watanabe Y, Nishida T, Hiramatsu M, Ohtonari T, Yamaguchi S, Mitsuhara T, Matsui S, Uchikado H, Hattori G, Yamahata H, and Taniguchi M

Abstract

Objective: The purpose of the present study was to compare the treatment success rates of primary neurosurgical and endovascular treatments in patients with spinal dural arteriovenous fistulas (dAVFs)., Methods: Data from 199 consecutive patients with thoracic and lumbosacral spinal dAVFs were collected from 18 centers. Angiographic and clinical findings, the rate of initial treatment failure or recurrence by procedures, risk factors for treatment failure, complications, and neurological outcomes were statistically analyzed., Results: Spinal dAVFs were frequently detected in the thoracic region (81%), fed by a single feeder (86%), and shunted into an intradural vein via the dura mater. The fistulous connection between the feeder(s) and intradural vein was located at a single spinal level in 195 patients (98%) and at 2 independent levels in 4 patients (2%). Among the neurosurgical (n = 145), and endovascular (n = 50) treatment groups of single dAVFs (n = 195), the rate of initial treatment failure or recurrence was significantly higher in the index endovascular treatment group (0.68% and 36%). A multivariate analysis identified endovascular treatment as an independent risk factor with significantly higher odds of initial treatment failure or recurrence (OR 69; 95% CI 8.7-546). The rate of complications did not significantly differ between the two treatment groups (4.1% for neurosurgical vs 4.0% for endovascular treatment). With a median follow-up of 26 months, improvements of ≥ 1 point in the modified Rankin Scale (mRS) score and Aminoff-Logue gait and Aminoff-Logue micturition grades were observed in 111 (56%), 121 (61%), and 79 (40%) patients, respectively. Independent risk factors for lack of improvement in the Aminoff-Logue gait grades were multiple treatments due to initial treatment failure or recurrence (OR 3.1) and symptom duration (OR 1.02)., Conclusions: Based on data obtained from the largest and most recently assessed multicenter cohort, the present study shows that primary neurosurgery is superior to endovascular treatment for the complete obliteration of spinal dAVFs by a single procedure.

Published
2020
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38. [Prolonged cerebral salt wasting following craniopharyngioma surgery and posterior reversible encephalopathy syndrome: a case report].

Author

Ohtonari T, Hashimoto M, Urasaki E, Yokota A, Araki S, Asayama K, and Shirahata A

Subjects
Brain pathology, Cerebral Ventricle Neoplasms surgery, Child, Diffusion Magnetic Resonance Imaging, Humans, Male, Brain Edema etiology, Craniopharyngioma surgery, Hypertensive Encephalopathy etiology, Hyponatremia etiology, Postoperative Complications diagnosis
Abstract

A 9-year-old boy was admitted to our hospital with daytime urinary incontinence for the past one year. MRI showed craniopharyngioma occupying the third ventricle. The tumor was excised by interhemispheric approach. Because hyponatremia and polyuria with high renal loss of sodium were observed on postoperative day 3, hydrocortisone and DDAVP were replaced. On postoperative day 24, successive general convulsions and hyponatremia recurred, and MRI FLAIR imaging showed marked brain edema in the bilateral parieto-occipital lobes. This finding disappeared late in the course of treatment, and the case was diagnosed as posterior reversible encephalopathy syndrome. The pathophysiology of cerebral salt wasting and posterior reversible encephalopathy syndrome in a craniopharyngioma patient are also discussed in the article.

Published
2005

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