Papers - Toda, Masahiro

The role of optimal cut-off diagnosis in 11C-methionine PET for differentiation of intracranial brain tumor from non-neoplastic lesions before treatment

Tomohiro Yamaki, Yoshinori Higuchi, Yasuo Iwadate, Tomoo Matsutani, Seiichiro Hirono, Hikaru Sasaki, Masahiro Toda, Shinji Onodera, Nobuo Oka, Shigeki Kobayashi

Clinical Imaging (Elsevier Science Inc.)  92   124 - 130 2022.12

Joint Work

Gene therapy using genome-edited iPS cells for targeting malignant glioma

Tamura R, Miyoshi H, Imaizumi K, Yo M, Kase Y, Sato T, Sato M, Morimoto Y, Sampetrean O, Kohyama J, Shinozaki M, Miyawaki A, Yoshida K, Saya H, Okano H, Toda M

Bioengineering & Translational Medicine (Wiley)     e10406 2022.09

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Surgical Planning and Simulation of Endonasal Endoscopic Surgery for Pituitary Adenoma with Cavenous Sinus Invasion

Tamura R,Oda H,Kosugi K,Toda M

Operative　Neurosurgery 23 ( 4 ) e276 - e282 2022.07

Joint Work, Corresponding author, Accepted

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Role of endovascular treatment for ruptured aneurysms involving the anterior spinal artery at the craniocervical junction

Mizutani K , Akiyama T, Tomita H, Toda M

J Neuroradiol (Amer Soc Neuroradiology)  50 ( 1 ) 44 - 49 2022.04

Joint Work, Accepted

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Imaging of the venous plexus of Rektorzik using CT-digital subtraction venography:a retrospective study

Ryota Imai,Katsuhiro Mizutani,Takenori Akiyama,Takashi Horiguchi,Yoshifumi Takatsume,Masahiro Toda

Neuroradiology (Spriger)  64 ( 10 ) 1961 - 1968 2022.04

Research paper (scientific journal), Joint Work

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Stepwise improvement in limb shaking achieved by staged angioplasty for severe carotid stenosis.

Takahara K, Akiyama T, Yoshida K, Yamada H, Oishi Y, Kuranari Y, Katsumata M, Toda M

Neuroradiol J (Sage Publications inc.)  35 ( 2 ) 260 - 263 2022.04

Joint Work

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治療前の非腫瘍性病変からの頭蓋内脳腫瘍の鑑別のための11C-メチオニンPETにおける最適なカットオフ診断の役割

山木 智宏, 樋口 義則, 岩立 康夫, 松谷 智生, 広野 誠一郎 , 佐々木 光, 戸田 正博 , 小野寺 真二 , 岡 信夫 , 小林 茂樹

臨床イメージング (エルゼビア・サイエンス・パブリッシング・カンパニー)   2022

Accepted

Cone-beam computed tomography fusion technique for vascular assessment of skull base meningiomas

Yoshida K, Akiyama T, Takahashi S, Miwa T, Horiguchi T, Sasaki H, Toda M

World Neurosurg (Elsevier Science Inc.)  S1878-8750 ( 21 ) 61 - 69 2021.04

Research paper (scientific journal), Joint Work

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A novel histopathological classification of meningiomas based on dural invasion

Murase M, Tamura R, Kuranari Y, Sato M, Ohara K, Morimoto Y, Yoshida K, Toda M

J Clin Path 74 ( 4 ) 238 - 243 2021.04

Research paper (scientific journal), Joint Work, Accepted

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Aims Histological invasion into the adjacent brain parenchyma is frequently investigated in meningioma because it is an important morphological criterion for grade II meningioma according to the 2016 WHO classification. However, few studies have focused on dural invasion of meningiomas. Herein, we propose a novel histopathological classification based on dural invasion of meningiomas. Methods Forty-nine cases with WHO grade I meningiomas who underwent Simpson grade I removal were collected. After the meningeal layer (ML) and periosteal layer (PL) of dura mater were visualised by Masson's trichrome stain, we evaluated the depth (to the ML and PL) and the patterns (1, expanding; 2, infiltrating) of dural invasion of meningiomas using serial paraffin sections. Invasion-associated markers, including Ki-67, matrix metalloproteinase (MMP)-1, MMP-9 and MMP-13, aquaporin 1 and Na-K-2Cl cotransporter, were quantitatively analysed by immunohistochemistry. Results Thirty-five cases (71.4%) showed the dural invasion. In 27 of these 35 cases (77.1%), dural invasion was localised in ML. Type 1 (expanding type) and type 2 (infiltrating type) invasions were observed in 23 and 12 cases, respectively. The recurrence rate in cases with type 2 invasion was significantly higher than that in cases with type 1 invasion. The percentage of MMP-1-positive tumour cells was also significantly higher in cases with dural invasion than those without, suggesting involvement of MMP-1 in dural invasion. Conclusions We quantitatively evaluated the depth and patterns of dural invasion in meningiomas. The patterns of dural invasion were associated with meningioma recurrence.

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Angio-anatomical study of the pterygovaginal artery based on cone-beam computed tomography

Yoshida K, Akiyama T, Raz E, Kamamoto D, Ozawa H, Toda M

Neruoradiology (Neuroradiology)   2021.02

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00283940

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Purpose: To investigate the anatomical characteristics and clinical implications of the pterygovaginal artery (PtVA), a recurrent branch from the distal internal maxillary artery (IMA), which courses through the pterygovaginal canal that connects the pterygopalatine fossa and nasopharynx. Methods: Eighty-two patients with 90 sides of cone-beam computed tomography (CBCT) reconstructed from rotational angiography of the external or common carotid artery with a field of view covering the pterygopalatine fossa were retrospectively reviewed. The origin from the IMA, branching type, distribution, and anastomoses was evaluated. The underlying lesions were 36 hypervascular lesions with possible supply from PtVA (17 cavernous sinus arteriovenous fistulas (AVFs), 6 anterior condylar AVFs, and 13 nasopharyngeal, parasellar, or paraclival tumors) and 46 other diseases. Results: PtVA was identified in 75 sides (83%). It originated from the pterygopalatine segment of the IMA in 45 sides (60%) and from the pterygoid segment in 30 sides (40%). It arose independently (77%), sharing the common trunk with the Vidian artery (15%) or with other branches. It ran posteromedially through the pterygovaginal canal to supply the mucosa over the nasopharyngeal roof, the choanae, and the pharyngeal ostium of the eustachian tube. It anastomosed with the ascending pharyngeal artery (n=37), the accessory meningeal artery (n=7), and the mandibular artery from the petrous internal carotid artery (n=2). It served as a feeder of osseous AVFs and skull base tumors. Conclusion: PtVA was often identified by CBCT even in normal anatomy. Its detailed angio-anatomy could be evaluated in the presence of parasellar or paraclival hypervascular lesions.

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Recent progress in the research of suicide gene therapy for malignant glioma

Tamura R., Miyoshi H., Yoshida K., Okano H., Toda M.

Neurosurgical Review (Neurosurgical Review)  44 ( 1 ) 29 - 49 2021.02

ISSN  03445607

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Malignant glioma, which is characterized by diffuse infiltration into the normal brain parenchyma, is the most aggressive primary brain tumor with dismal prognosis. Over the past 40 years, the median survival has only slightly improved. Therefore, new therapeutic modalities must be developed. In the 1990s, suicide gene therapy began attracting attention for the treatment of malignant glioma. Some clinical trials used a viral vector for suicide gene transduction; however, it was found that viral vectors cannot cover the large invaded area of glioma cells. Interest in this therapy was recently revived because some types of stem cells possess a tumor-tropic migratory capacity, which can be used as cellular delivery vehicles. Immortalized, clonal neural stem cell (NSC) line has been used for patients with recurrent high-grade glioma, which showed safety and efficacy. Embryonic and induced pluripotent stem cells may be considered as sources of NSC because NSC is difficult to harvest, and ethical issues have been raised. Mesenchymal stem cells are alternative candidates for cellular vehicle and are easily harvested from the bone marrow. In addition, a new type of nonlytic, amphotropic retroviral replicating vector encoding suicide gene has shown efficacy in patients with recurrent high-grade glioma in a clinical trial. This replicating viral capacity is another possible candidate as delivery vehicle to tackle gliomas. Herein, we review the concept of suicide gene therapy, as well as recent progress in preclinical and clinical studies in this field.

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Effect of Gravity on Brain Structure as Indicated on Upright Computed Tomography

Yokoyama Y, Yamada Y, Kosugi K, Yamda M, Narita K, Nakahara T, Fujiwara H, Toda M, Jinzaki M

Scientific Reports (Scientific Reports)  11 ( 1 ) 392 2021.01

Research paper (scientific journal), Joint Work, Accepted

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We aimed to use upright computed tomography (CT) to depict posture-related changes in the brain tissue under normal gravity. Thirty-two asymptomatic volunteers underwent upright CT in the sitting position and conventional CT in the supine position on the same day. We compared the shift of the pineal body, cerebellar tonsil, the length of pituitary stalk, optic nerve sheath area and perimeter (ONSA and ONSP, respectively), and lateral ventricular volume between the supine and sitting positions. We also compared shape changes of the cerebrospinal fluid (CSF) spaces at different sites between both positions. In the sitting position, the pineal body shifted 0.68 ± 0.27 mm in the ventral direction and 0.76 ± 0.24 mm in the caudal direction, the length of pituitary stalk decreased by 1.23 ± 0.71 mm, the cerebellar tonsil descended by 2.10 ± 0.86 mm, the right ONSA decreased by 15.21 ± 6.54%, the left ONSA decreased by 15.30 ± 7.37%, the right ONSP decreased by 8.52 ± 3.91%, the left ONSP decreased by 8.20 ± 4.38%, and the lateral ventricular volume decreased by 5.07 ± 3.24% (all P < 0.001). We also observed changes in the shape of CSF spaces with changes in posture. We concluded that the intracranial structure of healthy subjects and volume of ventricles changed according to posture on Earth.

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Cystic Dumbbell-shaped C1 Schwannoma with intracranial extension and hydrocephalus: a case report

Matsui Y, Fukumura M, Toda M

World Neurosurg 148   24 - 28 2021.01

Research paper (scientific journal), Joint Work

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Background: Schwannomas at the craniocervical junction commonly originate from the lower cranial nerves or C1 and C2 nerves. To date, very few cases of C1 schwannomas have been described in the literature, and the majority involve either the intra- or the extradural compartment, but not both. To our knowledge, this report documents the first case of a dumbbell-shaped C1 schwannoma that encompassed both intra- and extradural compartments and was accompanied by hydrocephalus. Case Description: The patient was admitted to our hospital, where magnetic resonance imaging revealed a tumor at the craniocervical junction, extending from the C1 level of the right first cervical vertebra into the cerebellopontine angle with 2 giant cysts. We removed the tumor by performing a midline posterior craniectomy and cervical laminectomy. Intraoperatively, the tumor was found to originate from the right C1 posterior root. The pathological diagnosis was of a schwannoma. The patient was subsequently discharged without any neurologic deficits. Conclusions: To our knowledge, we present the first case of a dumbbell-shaped C1 schwannoma with intracranial extensions and accompanying hydrocephalus. The tumor had spread inside and outside the dura, but was safely removed. Our findings in this case emphasize that to achieve safe resection, detailed case-specific preoperative consideration is essential.

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Orthostatic Enlargement of a Supracerebellar　Arachnoid Cyst with Cerebellar Descent Visualized by Upright Computed Tomography

Yoshida K, Toda M, Yamada Y, Yamada M, Yokoyama Y, Fujiwara H, Kosugi K, Sasaki H, Jinzaki M

World Neurosurgery (World Neurosurgery)  145   256 - 259 2021.01

Research paper (scientific journal), Joint Work, Accepted,  ISSN  18788750

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Background: Posterior fossa arachnoid cysts are often asymptomatic, but can rarely cause postural headache, the mechanism of which remains unknown. Case Description: We present a 40-year-old woman with an asymptomatic supracerebellar arachnoid cyst. Upright computed tomography (CT) showed enlargement of the arachnoid cyst and caudal descent of the cerebellum compared with supine CT with narrowing of the craniocervical junction cerebrospinal fluid space. Conclusions: This finding aids in understanding the association of posterior fossa arachnoid cysts with orthostatic headache. Clinicians should be aware of possible posture-related changes in intracranial structures.

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A case of moyamoya disease symptomatized early after nivolumab initiation – Possible association between immune checkpoint inhibitors and moyamoya disease

Takahashi S., Matsui Y., Kubo H., Toda M.

Clinical Neurology and Neurosurgery (Clinical Neurology and Neurosurgery)  200 2021.01

ISSN  03038467

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Pterygovaginal artery as a target of embolization before endoscopic skull base surgery

Yoshida K., Akiyama T., Raz E., Kamamoto D., Ozawa H., Toda M.

Neuroradiology Journal (Neuroradiology Journal)   2021

ISSN  19714009

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Background: The pterygovaginal artery (PtVA), a recurrent branch of the internal maxillary artery (IMA), can be a feeder of skull base tumors. Preoperative embolization can help endoscopic resection of hypervascular lesions, which is performed under a narrow surgical space with restricted instrumental maneuverability. Methods: We performed preoperative embolization in five cases with hypervascular skull base lesions supplied by the PtVA, four of which were resected via endoscopic endonasal approach. In two cases, selective PtVA embolization through the distal IMA was successfully conducted. Results: In all the cases, intraoperative bleeding during endoscopic resection was easily controlled. The medial and lateral origins of the PtVA from the IMA were demonstrated by cone-beam CT images reconstructed from three-dimensional rotational angiography, and anastomoses around the eustachian tube and soft palate were visualized by superselective angiography. Conclusions: The PtVA embolization can be an effective strategy before endoscopic skull base tumor resection. When embolizing through the PtVA, clinicians should be aware of its anatomical variations and dangerous anastomoses. Understanding the surrounding angioarchitecture by angiographic techniques helps ensure safe embolization.

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うつ病への脳深部刺激（DBS）療法　脳外科医と精神科医の視点から

高宮彰紘、福村麻里子、小杉健三、戸田正博、三村　將

精神医学 63 ( 12 ) 1825 - 1832 2021

Research paper (scientific journal), Joint Work, Last author,  ISSN  04881281

Quiescent and activated fibroblasts in lateral ventricular meningioma with a dura-like membrane

Sato M, Tamura R, Morimoto Y, Ohishi Y, Yoshida K, Toda M

World Neurosurg (World Neurosurgery)  S1878-8750(20)32591-2 ( 20 ) 32591 - 32592 2020.12

Research paper (scientific journal), Joint Work, Accepted,  ISSN  18788750

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Background: Lateral ventricular meningioma (LVM) is a rare entity, accounting for 0.5%–5% of all intracranial meningiomas. This type of meningioma arises from meningothelial inclusion bodies in the tela choroidea and/or mesenchymal stroma of the choroid plexus. Although not yet fully characterized, a membranous structure is frequently observed around LVMs. This study analyzed quiescent and activated fibroblast phenotypes in LVMs with focus on the relationship between tumor growth and development of the membranous structure. Methods: This retrospective study analyzed 9 LVM cases for which gross total removal was achieved. Expression of the ependymal cell marker (Forkhead Box J1 [FoxJ1]) was histopathologically evaluated. The distribution of quiescent and activated fibroblasts was also analyzed using anti-fibroblast-specific protein-1 (FSP1)/S100A4 antibody and anti-α-smooth muscle actin (αSMA) antibody, respectively. The control group was 5 cases with primary convexity meningioma for which Simpson grade I removal was achieved. Results: Small LVMs (≤30 mm) were covered by a FoxJ1-positive(+) ependymal cell monolayer; no αSMA(+) cells were detected in the tumor; and a thick membrane capsule was not observed. None of the convexity meningiomas showed FoxJ1(+) cells. Large LVMs (>30 mm) had thick membrane capsules without an ependymal cell monolayer, which resembled dura mater. The FSP1/S100A4(+) and αSM(+) cells were clearly concentrated in the peripheral area just below the thick dura mater-like membrane capsules. Conclusions: This study found an association between activated fibroblasts and dura mater–like membrane capsules in LVMs. The characteristics of membranous structure in LVMs may differ depending on tumor size.

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Endoscopic Endonasal Management of Pterygopalatine Fossa Tumors

Ozawa H, Sekimizu M, Saito S, Shintaro Nakamura S, Mikoshiba T, Toda M and Ogawa K

The Journal of Craniofacial Surgery Epub ahe 2020.11

Research paper (scientific journal), Joint Work, Accepted

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Prognostic significance of preoperative neutrophil-to-lymphocyte ratio in patients with meningiomas

Kuranari Y, Tamura R, Tsuda N, Kosugi K, Morimoto Y, Yoshida K, Toda M

Frontiers in Oncology (Frontiers in Oncology)  Epub ahe 2020.11

Research paper (scientific journal), Joint Work, Accepted

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Background: Meningiomas are the most common benign intracranial tumors. However, even WHO grade I meningiomas occasionally show local tumor recurrence. Prognostic factors for meningiomas have not been fully established. Neutrophil-to-lymphocyte ratio (NLR) has been reported as a prognostic factor for several solid tumors. The prognostic value of NLR in meningiomas has been analyzed in few studies. Materials and Methods: This retrospective study included 160 patients who underwent surgery for meningiomas between October 2010 and September 2017. We analyzed the associations between patients’ clinical data (sex, age, primary/recurrent, WHO grade, extent of removal, tumor location, peritumoral brain edema, and preoperative laboratory data) and clinical outcomes, including recurrence and progression-free survival (PFS). Results: Forty-four meningiomas recurred within the follow-up period of 3.8 years. WHO grade II, III, subtotal removal, history of recurrence, Ki-67 labeling index ≥3.0, and preoperative NLR value ≥2.6 were significantly associated with shorter PFS (P < 0.001, < 0.001, 0.002, < 0.001, and 0.015, respectively). Furthermore, NLR ≥ 2.6 was also significantly associated with shorter PFS in a subgroup analysis of WHO grade I meningiomas (P = 0.003). In univariate and multivariate analyses, NLR ≥2.6 remained as a significant predictive factor for shorter PFS in patients with meningioma (P = 0.014). Conclusions: NLR may be a cost-effective and novel preoperatively usable biomarker in patients with meningiomas.

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