Faculty Profiles - HIRAMATSU Masafumi

Presentations -

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Characteristics and treatment strategy of multiple dural arteriovenous fistula Invited

2025.3.8

Visualization of the micro-angioarchitecture for the treatment of CCJAVF Invited

Masafumi Hiramatsu, Fumiyo Higaki, Jun Haruma, Susumu Sasada, Takao Yasuhara, Kenji Sugiu, Shota Tanaka

The 40th annual meeting of the Japanese Society for Neuroendovascular Therapy 2024.11.22

Venous anatomy around the cerebellar tent and the mixed dural-pial arteriovenous fistula Invited

Masafumi Hiramatsu, Jun Haruma, Kenji Sugiu, Shota Tanaka

The 40th annual meeting of the Japanese Society for Neuroendovascular Therapy 2024.11.21

Spinal vascular anatomy and homology of spinal and intracranial arteriovenous shunts Invited

Masafumi Hiramatsu

17th Niche Neuro-Angiology Conference 2024.6.8

Analyses of cranio-cervical junction arteriovenous fistulas using micro-angioarchitecture Invited

Masafumi Hiramatsu

2024.5.10

Treatment of falco-tentorial group dural arteriovenous fistulas

Masafumi Hiramtasu, Kenji Sugiu, Jun Haruma, Yoko Yamaoka, Yuki Ebisudani, Hisanori Edaki, Ryu Kimura, Masato Kawakami, Soutome Yuta, Isao Date

2024.3.9

Borden typeⅠ 硬膜動静脈瘻の自然歴と治療成績：文献review（シンポジウム） Invited

平松匡文, 春間純, 杉生憲志

第39回NPO法人日本脳神経血管内治療学会学術集会 2023.11.24 近畿大学医学部脳神経外科/脳卒中センター

Event date： 2023.11.22 - 2023.11.25

Language：Japanese Presentation type：Symposium, workshop panel (nominated)

Venue：京都

皮質静脈逆流（cortical venous reflux: CVR）を伴わないbenign typeの硬膜動静脈瘻（dural arteriovenous fistula: dAVF）の自然歴は良好であり、CVRを伴うaggressive typeに変化するリスクは1-2%程度であると報告されている。生活に支障を来すレベルの自覚症状を呈するbenign typeのdAVFに対しては治療が行われることがあるが、罹患静脈洞が正常静脈還流に関与していることも多く、静脈洞の温存が必要となる。以前はtransarterial embolization (TAE)でのflow reductionが治療の主体であったが、近年ではballoon catheterによるsinus protection下にOnyxを注入して根治を狙うTAEが、積極的に行われるようになっている。治療により自覚症状の改善は得られやすいが、治療に伴う合併症リスクは無視できない。また、定位放射線治療の報告も増えてきている。本発表では、過去の文献をもとにBorden type 1 dAVFの自然歴と、合併症リスクを含めた治療成績を論じる。

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脊髄動静脈シャント疾患の血管撮影所見と治療（Continuing Education Program） Invited

平松匡文

第39回NPO法人日本脳神経血管内治療学会学術集会 2023.11.22 近畿大学医学部脳神経外科/脳卒中センター

Characteristics and treatment of multiple dural arteriovenous fistula

2023.11.24

Incidence and clinical characteristics of spinal arteriovenous shunt in Okayama prefecture Invited

Masafumi Hiramatsu, Ryota Ishibashi, Etsuji Suzuki, Yuko Miyazaki, Yuji Takasugi, Satoshi Murai, Tomohito Hishikawa, Jun Haruma, Takao Yasuhara, Kenji Sugiu, Isao Date

The 82nd Annual Meeting of the Japan Neurosurgical Society 2023.10.27

Spinal angiography and spinal dural arteriovenous fistula Invited

Masafumi Hiramatsu, Kenji Sugiu, Takao Yasuhara, Isao Date

The 43rd Annual meeting of the Japanese Congress of Neurological Surgeons 2023.5.20

脊髄動静脈シャントの疫学、分類、診断と治療（教育講演） Invited

平松匡文, 杉生憲志, 安原隆雄, 菱川朋人, 春間純, 伊達勲

第52回日本脳卒中の外科学会学術集会 2023.3.17 国立循環器病研究センター

Clinical characteristics and treatment of spinal epidural arteriovenous fistula

Masafumi Hiramatsu, Kenji Sugiu, Takao Yasuhara, Tomohito Hishikawa, Jun haruma, Kazuhiko Nishi, Yoko Yamaoka, Yuki Ebisudani, Ryu Kimura, Hisanori Edaki, Isao Date

2022.11.12

Bridging veins at the foramen magnum: Anatomical evaluation by 3D angiography: A multicenter study Invited

Masafumi Hiramatsu

2022.11.11

多発性硬膜動静脈瘻の特徴と治療（シンポジウム）

平松匡文, 杉生憲志, 菱川朋人, 春間純, 西和彦, 山岡陽子, 佐藤悠, 胡谷侑貴, 枝木久典, 木村颯, 伊達勲

（一社）日本脳神経外科学会第81回学術総会（現地・Web併催） 2022.9.28 岩手医科大学脳神経外科

Anatomical analyses of the lateral spinal artery and craniocervical junction arteriovenous fistula using cone-beam CT International conference

Masafumi Hiramatsu, Kenji Sugiu, Takao Yasuhara, Tomohito Hishikawa, Jun Haruma, Kazuhiko Nishi, Yoko Yamaoka, Yu Sato, Yuki Ebisudani, Isao Date

16th Congress of World Federation of Interventional and Therapeutic Neuroradiology 2022.8.22 Kobe City Medical Center general Hospital

AVF at the craniocervical junction and cervical spine (Education session) Invited International conference

Masafumi HIRAMATSU, Shuuichi TANOUE, Kenji SUGIU, Tomoya ISHIGURO, Kenichi SATO, Toshiki ENDO, Keisuke TAKAI, Hiro KIYOSUE, Yasunari NIIMI, Yuji MATSUMARU

16th Congress of World Federation of Interventional and Therapeutic Neuroradiology 2022.8.21 Kobe City Medical Center general Hospital

Anatomical analyses of the lateral spinal artery and craniocervical junction arteriovenous fistula using cone-beam CT

Masafumi Hiramatsu, Kenji Sugiu, Takao Yasuhara, Tomohito Hishikawa, Jun Haruma, Satoshi Murai, Kazuhiko Nishi, Yoko Yamaoka, Yu Sato, Yuki Ebisudani, Isao Date

2021.11.27

Event date： 2021.11.25 - 2021.11.27

Language：Japanese Presentation type：Symposium, workshop panel (public)

[Background] The lateral spinal artery (LSA) perfuses the dorsolateral part of the spinal cord at the craniocervical junction (CCJ). We analyze the angioarchitecture of normal LSA and CCJ arteriovenous fistula (AVF).
[Methods 1] This study included 26 patients with vertebral artery or posterior inferior cerebellar artery (PICA) aneurysm treated in our department between 2016 and 2021. Using slab maximum intensity projection (MIP) images of 3D-RA and cone-beam CT (CBCT), we analyzed the origin of LSA, anastomosis with PICA, reaching point to the spinal cord, and perfused range of craniocaudal direction.
[Methods 2] We analyzed angioarchitecture and treatment results of four patients with seven lesions of CCJAVF treated in our department between 2016 and 2021.
[Results 1] We could visualize the LSA using CBCT in all cases. The LSA originated from C1 and C2 segmental arteries in 22 (85%) and 6 (23%) cases. LSA had anastomosis with the PICA in 11 patients (42%). The LSA reached the dorsolateral part of the spinal cord in all cases. The mean visualized range of the LSA was 27.4mm (range: 6.2-41.6mm).
[Results 2] There were three perimedullary AVFs, two radicular AVFs, one dural AVF, and one epidural AVF. The anterior spinal artery (ASA) and LSA were involved in 3 (43%) and 5 lesions (71%). All cases other than the epidural AVF had a pial arterial supply from the ASA or LSA. There was one case with lateral part of spinal cord infarction after embolization of the LSA. Other lesions were treated with direct interruption of the AVF, and we could preserve the ASA and LSA.
[Conclusions] We could visualize the LSA using the slab MIP images of 3D-RA and CBCT. Most cases of the CCJAVF involve the LSA, and we need the treatment strategy with preservation of the LSA.

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Midline DAVFs of the falx cerebri and its boundaries: Anterior falx cerebri Invited

2021.11.27

Spinal epidural AVF with osseous involvement Invited

2021.11.25

Event date： 2021.11.25 - 2021.11.27

Language：Japanese Presentation type：Symposium, workshop panel (public)

[Background] Spinal epidural arteriovenous fistulas (SEDAVFs) are rare diseases and include osseous AVFs, which develop in the vertebral body or arch. We summarize our case series of SEDAVF with osseous involvement and review past literature.
[Methods] This study included four patients of SEDAVF with osseous involvement treated in our department between 2011 and 2021. We analyze the clinical characteristics, angioarchitecture, and treatment results.
[Results] Of the four patients, three were women, and the mean age was 58 years. Three cases had a history of spinal surgery, and another had a spinal compressed fracture before our treatment. One patient suffered from congestive myelopathy due to reflux to the medullary vein, and two patients had symptoms of lumbar canal stenosis due to dilated venous pouch. Another case had not only osseous and epidural AVF but also dural, perimedullary, and paraspinal AVFs, and suffered from progressive paraparesis. All cases had numerous feeders from four or more segmental arteries, and shunt levels were included between Th12-L3. All cases had dilated venous pouch in the bone and spinal canal and drainage route from epidural space to the paravertebral vein. One patient with intradural reflux was treated by surgical interruption of the intradural vein. The other three cases were treated with transarterial venous embolization or transvenous embolization using coils and glue and achieved good angiographical results. All patients had no procedural complication, and all cases other than the case with multiple AVFs achieved symptom resolution.
[Conclusion] Our case series of SEDAVF with osseous involvement has numerous feeders and diffuse shunt, different from usual SEDAVFs. We need to treat the venous side using coils and glue.

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