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Article ; Online: Evaluation of Neointimal Coverage After Placement of a Flow Diverter Using Angioscopy.

Fukutome, Kenji / Shiba, Mikio / Matsuoka, Ryuta / Aketa, Shuta / Motoyama, Yasushi

2023 Volume 54, Issue 2, Page(s) e40–e41

MeSH term(s)	Humans ; Angioscopy ; Neointima ; Sirolimus ; Intracranial Aneurysm ; Stents
Chemical Substances	Sirolimus (W36ZG6FT64)
Language	English
Publishing date	2023-01-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	80381-9
ISSN	1524-4628 ; 0039-2499 ; 0749-7954
ISSN (online)	1524-4628
ISSN	0039-2499 ; 0749-7954
DOI	10.1161/STROKEAHA.122.041912
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Article ; Online: Eagle jugular syndrome accompanied by de novo brainstem cavernous malformation: a case-based systematic review.

Motoyama, Yasushi / Sasaki, Hiromitsu / Nakajima, Tsukasa / Hayami, Hiromichi / Matsuoka, Ryuta / Fukutome, Kenji / Tei, Rinsei / Shin, Yasushi / Aketa, Shuta

Acta neurochirurgica

2024 Volume 166, Issue 1, Page(s) 20

Abstract: Background: Eagle jugular syndrome (EJS), recently identified as a cause of cerebrovascular disease (CVD) due to venous obstruction by an elongated styloid process (SP), is reported here alongside a case of concurrent de novo cerebral cavernous ... ...

Abstract	Background: Eagle jugular syndrome (EJS), recently identified as a cause of cerebrovascular disease (CVD) due to venous obstruction by an elongated styloid process (SP), is reported here alongside a case of concurrent de novo cerebral cavernous malformation (CCM). This study aims to explore the potential causal relationship between EJS and de novo CCM through a comprehensive literature review. Method: Systematic literature reviews, spanning from 1995 to 2023, focused on EJS cases with definitive signs and symptoms and de novo CCM cases with detailed clinical characteristics. Data on the pathophysiology and clinical manifestations of EJS, as well as potential risk factors preceding de novo CCM, were collected to assess the relationship between the two conditions. Result: Among 14 patients from 11 articles on EJS, the most common presentation was increased intracranial hypertension (IIH), observed in 10 patients (71.4%), followed by dural sinus thrombosis in four patients (28.6%). In contrast, 30 patients from 28 articles were identified with de novo CCM, involving 37 lesions. In these cases, 13 patients developed CCM subsequent to developmental venous anomalies (43%), seven following dural arteriovenous fistula (dAVF) (23%), and two after sinus thrombosis (6%). In a specific case of de novo brainstem CCM, the development of an enlarged condylar emissary vein, indicative of venous congestion due to IJV compression by the elongated SP, was noted before the emergence of CCM. Conclusion: This study underscores that venous congestion, a primary result of symptomatic EJS, might lead to the development of de novo CCM. Thus, EJS could potentially be an indicator of CCM development. Further epidemiological and pathophysiological investigations focusing on venous circulation are necessary to clarify the causal relationship between EJS and CCM.
MeSH term(s)	Humans ; Brain Stem/diagnostic imaging ; Hyperemia/epidemiology ; Ossification, Heterotopic/epidemiology ; Sinus Thrombosis, Intracranial/epidemiology ; Temporal Bone/abnormalities
Language	English
Publishing date	2024-01-17
Publishing country	Austria
Document type	Case Reports ; Journal Article ; Systematic Review
ZDB-ID	80010-7
ISSN	0942-0940 ; 0001-6268
ISSN (online)	0942-0940
ISSN	0001-6268
DOI	10.1007/s00701-024-05900-x
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Article: Supratentorial convexity schwannoma unrelated to cranial nerves: Case report and review of the literature.

Wajima, Daisuke / Aketa, Shuta / Yonezawa, Taiji

Surgical neurology international

2020 Volume 11, Page(s) 143

Abstract: Background: Intracranial schwannoma not related to cranial nerves is rare entity, and difficult to be diagnosed preoperatively. Here, we experienced a case of convexity schwannoma mimicking convexity meningioma, and discuss about the characteristics of ... ...

Abstract	Background: Intracranial schwannoma not related to cranial nerves is rare entity, and difficult to be diagnosed preoperatively. Here, we experienced a case of convexity schwannoma mimicking convexity meningioma, and discuss about the characteristics of such cases based on the past published reports. Case description: A 48-year-old man presented with a sudden onset of seizures. Brain magnetic resonance image (MRI) revealed a small mass lesion in the peripheral aspect of the right parieto-frontal lobe. The mass was isointense on T1-weighted and hyperintense on T2-weighted MRI, with homogenous enhancement after contrast medium administration. After the feeder embolization on the previous day, removal of the tumor was performed. The tumor revealed a well-demarcated, firm, spherical tumor beyond, and beneath the dura and was relatively easy to be separated from the brain. Histologically, the tumor was observed to be in subarachnoid space extending to outer space of dura-mater, intimately attached to the pia mater. The histological diagnosis was schwannoma. Conclusion: In our case, MRI findings are similar to convexity meningioma; however, the pathological diagnosis was schwannoma. Cerebral convexity is an extremely rare location for schwannoma. We emphasize that schwannoma, not related to cranial nerves, may arise in the subdural convexity space.
Language	English
Publishing date	2020-06-06
Publishing country	United States
Document type	Case Reports
ISSN	2229-5097
ISSN	2229-5097
DOI	10.25259/SNI_193_2020
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Article ; Online: Efficacy of endoscopic transsphenoidal surgery for cushing's disease: Case series and review of the literature.

Masui, Katsuya / Wajima, Daisuke / Aketa, Shuta / Nishimura, Fumihiko

Neurology India

2020 Volume 68, Issue 2, Page(s) 403–406

Abstract: Background: This study was performed to examine the efficacy of endoscopic transsphenoidal surgery (ETS) for Cushing's disease at a single institute and to review past reports.: Material and methods: We studied eight consecutive patients who ... ...

Abstract	Background: This study was performed to examine the efficacy of endoscopic transsphenoidal surgery (ETS) for Cushing's disease at a single institute and to review past reports. Material and methods: We studied eight consecutive patients who underwent ETS for Cushing's disease. The radiological evaluation comprised a detailed examination of preoperative magnetic resonance images (MRIs), including inferior petrosal sinus sampling, for cases with normal renal function. Remission was evaluated at least three months after surgery and was defined by the presence of hypocortisolemia that required steroid replacement therapy or eucortisolemia with suppression to <1.8 μg/dL after 1mg of dexamethasone. Results: In all cases preoperative MRI was abnormal and included two macroadenomas (25 %). Pathological confirmation of an adenoma was possible in all patients. The mean follow-up period was 5.6 (2-7) years. Remission was confirmed in 75.0% of the cases and was higher in rate for microadenoma (100%) than for macroadenoma (50%). Postoperatively , no cerebrospinal fluid rhinorrhea occurred, but new endocrine deficits were noted in 25% of patients. Conclusion: Based on this study, ETS enhanced the intrasellar identification of adenomatous tissue, which led to low remission and complication rates that were comparable with those of traditional microsurgery for Cushing's disease.
MeSH term(s)	ACTH-Secreting Pituitary Adenoma/pathology ; ACTH-Secreting Pituitary Adenoma/surgery ; Adenoma/pathology ; Adenoma/surgery ; Adrenal Cortex Function Tests ; Adult ; Aged ; Diabetes Insipidus/epidemiology ; Female ; Hormone Replacement Therapy ; Humans ; Hypopituitarism/epidemiology ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Nasal Cavity ; Natural Orifice Endoscopic Surgery ; Neuroendoscopy/methods ; Petrosal Sinus Sampling ; Pituitary ACTH Hypersecretion/surgery ; Postoperative Complications/epidemiology ; Sphenoid Sinus ; Treatment Failure ; Treatment Outcome ; Tumor Burden
Language	English
Publishing date	2020-05-15
Publishing country	India
Document type	Journal Article ; Review
ZDB-ID	415522-1
ISSN	1998-4022 ; 0028-3886
ISSN (online)	1998-4022
ISSN	0028-3886
DOI	10.4103/0028-3886.284363
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Article: Optimum concentration of iodine contrast agent injection for best stent visualization using Neuroform Atlas stent during stent-assisted coil embolization: Case reviews based on

Aketa, Shuta / Wajima, Daisuke / Kiyomoto, Masayoshi / Izumi, Natsuhiko / Yonezawa, Taiji

Surgical neurology international

2020 Volume 11, Page(s) 170

Abstract: Background: The present study aimed to evaluate the influence of contrast agent concentration (Conc) on the visibility of Neuroform Atlas : Methods: A plastic tube was filled with several Conc. in saline (experiment 1) and blood (experiment 2). ... ...

Abstract	Background: The present study aimed to evaluate the influence of contrast agent concentration (Conc) on the visibility of Neuroform Atlas Methods: A plastic tube was filled with several Conc. in saline (experiment 1) and blood (experiment 2). Thereafter, the Neuroform Atlas was placed around the plastic tube in an acrylic shield case. In experiment 3, the Neuroform Atlas was placed in the internal carotid artery of the endo vascular evaluator endovascular training system with an injection of several Conc in saline. Five slices of the axial images obtained using the 3D-cone-beam computed tomography (3D-CBCT) with the digital subtraction angiography system were evaluated. A 1-cm Results: Radiation density (Rd) was directly proportional to the contrast agent in saline and blood (experiment 1: (Rd (pixel)) = 6.8495 × (concentration (%)) + 152.72 (R Conclusion: Based on our
Language	English
Publishing date	2020-06-27
Publishing country	United States
Document type	Journal Article
ISSN	2229-5097
ISSN	2229-5097
DOI	10.25259/SNI_239_2020
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Article ; Online: Cerebral vasospasm after coil embolization for unruptured anterior communicating artery aneurysm: illustrative case.

Fukutome, Kenji / Aketa, Shuta / Fukumori, Junji / Mitsui, Takaaki / Nakajima, Tsukasa / Hayami, Hiromichi / Matsuoka, Ryuta / Tei, Rinsei / Shin, Yasushi / Motoyama, Yasushi

Journal of neurosurgery. Case lessons

2022 Volume 3, Issue 19

Abstract: Background: Compared with several reports of cerebral vasospasm after clipping for unruptured cerebral aneurysm, only one study to date has reported cerebral vasospasm after coil embolization. Herein, the authors report a rare case of cerebral vasospasm ...

Abstract	Background: Compared with several reports of cerebral vasospasm after clipping for unruptured cerebral aneurysm, only one study to date has reported cerebral vasospasm after coil embolization. Herein, the authors report a rare case of cerebral vasospasm after coil embolization for unruptured cerebral aneurysm. Observations: A 58-year-old woman with an unruptured anterior communicating artery aneurysm was referred to our department. Stent-assisted coil embolization was performed for the aneurysm, and no obvious adverse events were observed on cerebral angiography obtained immediately after the operation. However, the patient developed mild headache and slight restlessness soon after the operation and new-onset disorientation, left hemispatial neglect, and left hemiplegia the day after the operation. Emergency brain magnetic resonance imaging and cerebral angiography indicated vasospasm in the right middle cerebral artery, and intra-arterial injection of fasudil hydrochloride hydrate was performed to dilate the middle cerebral artery. Blood flow in the middle cerebral artery immediately improved, and she was discharged without neurological deficits 8 days after the operation. Lessons: Immediate intervention is necessary to prevent cerebral infarction in patients with cerebral vasospasm, which may occur even after coil embolization for unruptured cerebral aneurysm.
Language	English
Publishing date	2022-05-09
Publishing country	United States
Document type	Journal Article
ISSN	2694-1902
ISSN (online)	2694-1902
DOI	10.3171/CASE2288
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Article: A Novel Approach for Transvenous Embolization of Dural Arteriovenous Fistula Using a Balloon and a Coil as Walls: Case Presentation.

Fukutome, Kenji / Aketa, Shuta / Nakajima, Tsukasa / Hayami, Hiromichi / Sasaki, Hiromitsu / Matsuoka, Ryuta / Tei, Rinsei / Shin, Yasushi / Motoyama, Yasushi

Case reports in vascular medicine

2022 Volume 2022, Page(s) 5164452

Abstract: Background: Transvenous embolization (TVE) for dural arteriovenous fistula (DAVF) is difficult depending on an accessible route. Reported herein is a case of transvenous embolization using a balloon and a coil as "walls." : Conclusions: Using a ... ...

Abstract	Background: Transvenous embolization (TVE) for dural arteriovenous fistula (DAVF) is difficult depending on an accessible route. Reported herein is a case of transvenous embolization using a balloon and a coil as "walls." Conclusions: Using a balloon or coil as a wall during a TVE is useful.
Language	English
Publishing date	2022-02-25
Publishing country	United States
Document type	Case Reports
ZDB-ID	2629916-1
ISSN	2090-6994 ; 2090-6986
ISSN (online)	2090-6994
ISSN	2090-6986
DOI	10.1155/2022/5164452
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Article: Case report: Usefulness of angioscopy in determining antiplatelet drug reduction after carotid artery stenting.

Fukutome, Kenji / Shiba, Mikio / Aketa, Shuta / Mitsui, Takaaki / Shiraishi, Yuki / Hayami, Hiromichi / Murakami, Yasutaka / Matsuoka, Ryuta / Tei, Rinsei / Shin, Yasushi / Motoyama, Yasushi

Frontiers in neurology

2023 Volume 14, Page(s) 1152173

Abstract: We report a case in which neointima was confirmed by angioscopy and antiplatelet drug administration was reduced 2 months after carotid artery stenting (CAS). A patient in their 80s was scheduled to undergo resection for renal cancer; however, he also ... ...

Abstract	We report a case in which neointima was confirmed by angioscopy and antiplatelet drug administration was reduced 2 months after carotid artery stenting (CAS). A patient in their 80s was scheduled to undergo resection for renal cancer; however, he also had right cervical internal carotid artery stenosis. Because this was a risk for general anesthesia, CAS was performed after first starting dual antiplatelet therapy. Urologically, early reduction of antiplatelet drugs was necessary for a nephrectomy. Although no obvious neointima could be identified on ultrasound 2 months after CAS, thin neointima was observed using angioscopy. Based on the above results, we reduced the antiplatelet drug administration, and then the nephrectomy was performed. Ultimately, no cerebral infarction occurred in the perioperative or postoperative periods. Angioscopy allows for visual confirmation of thin neointima. If sufficient neointima can be confirmed, antiplatelet drug reduction can be performed more safely and reliably.
Language	English
Publishing date	2023-09-04
Publishing country	Switzerland
Document type	Case Reports
ZDB-ID	2564214-5
ISSN	1664-2295
ISSN	1664-2295
DOI	10.3389/fneur.2023.1152173
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Article ; Online: Comparison Between Cz-C3/C4 and C3-C4 Montages to Protect Against Peripheral Stimulation in Transcranial Facial Motor-Evoked Potential Monitoring.

Matsuoka, Ryuta / Hamada, Naoya / Nishimura, Nobuyuki / Mitsui, Takaaki / Shiraishi, Yuki / Hayami, Hiromichi / Fukutome, Kenji / Tei, Rinsei / Shin, Yasushi / Aketa, Shuta / Kato, Daizo / Kita, Takashi / Motoyama, Yasushi

Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society

2023

Abstract: Introduction: In facial motor-evoked potential monitoring, efforts to reduce peripheral stimulation are necessary because it can cause false-negatives. The effects of peripheral stimulation on Cz-C3/C4 and C3-C4 montages were compared.: Methods: ... ...

Abstract	Introduction: In facial motor-evoked potential monitoring, efforts to reduce peripheral stimulation are necessary because it can cause false-negatives. The effects of peripheral stimulation on Cz-C3/C4 and C3-C4 montages were compared. Methods: Facial motor-evoked potentials were recorded from bilateral orbicularis oculi (Oculi) and oris (Oris) muscles. The double-train approach combining single-pulse and five-train pulse stimulation was used to determine the effect of peripheral stimulation. If the five-train pulse produced a significant waveform, it was defined as "total success." In total success cases, "true success" was defined as a case in which no waveform appeared after the single pulse at the threshold level of the five-train pulse. The total and true success rates and the threshold value of Oculi and Oris were compared between Cz-C3/C4 and C3-C4 montages. Results: Thirty-six muscles each of Oculi and Oris of 18 patients were used for the analysis. True success was more likely to be obtained by the Cz-C3/C4 montage than the C3-C4 montage in Oculi (42% vs. 22%, p = 0.039). Both Oculi and Oris had higher thresholds to elicit facial motor-evoked potentials with the Cz-C3/C4 montage (Oculi: 101.7 vs. 71.4 mA, p = 0.038; Oris: 94.8 vs. 73.1 mA, p = 0.016). Conclusions: Cz-C3/4 montage is more effective at reducing peripheral stimulation compared with the C3-4 montage. This effect was primarily seen in the orbicularis oculi muscle. It should be noted that the Cz-C3/C4 montage has a higher threshold than the C3-C4 montage in facial muscles. In facial motor-evoked potential monitoring, the Cz-C3/C4 montage may be more suitable to eliminate peripheral stimulation.
Language	English
Publishing date	2023-11-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	605640-4
ISSN	1537-1603 ; 0736-0258
ISSN (online)	1537-1603
ISSN	0736-0258
DOI	10.1097/WNP.0000000000001024
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Article ; Online: Relationship Between Clinical Features and T2-Weighted Magnetic Resonance Images in Symptomatic Rathke Cleft Cysts.

Wajima, Daisuke / Yonezawa, Taiji / Masui, Katsuya / Aketa, Shuta

World neurosurgery

2015 Volume 88, Page(s) 421–427

Abstract: Background: It is not known when surgery is appropriate for the treatment for incidental Rathke cleft cysts because knowledge of their natural history is lacking. In this study, we sought to determine whether symptomatic Rathke cleft cysts could be ... ...

Abstract	Background: It is not known when surgery is appropriate for the treatment for incidental Rathke cleft cysts because knowledge of their natural history is lacking. In this study, we sought to determine whether symptomatic Rathke cleft cysts could be distinguished by their signal intensities in magnetic resonance (MR) images. We analyzed the relationship between these signal intensities and clinical manifestations of the cysts and their patterns of expansion. Methods: MR signal intensities on T1-weighted (T1W) and T2-weighted (T2W) images for 52 cases were categorized into 3 types. Type 1 (20 cases) showed low signal intensities on T1W images and hyperintensity on T2W images. Type 2 (10 cases) showed hyperintensity on both T1W and T2W images. Type 3 (22 cases) showed hypointensity on T2W images. Results: A significantly higher proportion of patients with type 1 signal intensities had large cysts compressing their third ventricle than patients with the other 2 types of signal intensities. Patients with type 1 signal intensities also frequently had visual disturbances. Anterior pituitary dysfunction was observed more often in patients with type 2 or 3 signal intensities than in patients with type 1 intensities. Conclusions: We conclude that Rathke cleft cysts that show an MR signal intensity similar to that of cerebrospinal fluid grow slowly and are frequently diagnosed as cysts associated with visual disturbance when they become large. It may be possible to predict the clinical progression of Rathke cleft cysts by assessing MR signal intensities.
MeSH term(s)	Adolescent ; Adult ; Aged ; Central Nervous System Cysts/diagnosis ; Central Nervous System Cysts/surgery ; Child ; Diffusion Magnetic Resonance Imaging/methods ; Female ; Humans ; Image Interpretation, Computer-Assisted/methods ; Male ; Middle Aged ; Reproducibility of Results ; Retrospective Studies ; Sensitivity and Specificity ; Statistics as Topic ; Symptom Assessment/methods ; Young Adult
Language	English
Publishing date	2015-10-17
Publishing country	United States
Document type	Comparative Study ; Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2015.10.018
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