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  1. Article ; Online: Are there characteristic indicators for increased pressure in chronic subdural hematoma?

    Tsutsumi, Satoshi / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia

    2024  Volume 121, Page(s) 42–46

    Abstract: Chronic subdural hematoma (CSDH) is one of the most common neurosurgical disorders. However, no study has yet documented biomarkers indicating increased CSDH pressure. This study aimed to explore such indicators. A total of 50 patients underwent ... ...

    Abstract Chronic subdural hematoma (CSDH) is one of the most common neurosurgical disorders. However, no study has yet documented biomarkers indicating increased CSDH pressure. This study aimed to explore such indicators. A total of 50 patients underwent measurement for CSDH pressure during burr-hole irrigation. The mean hematoma pressure was 16.8 ± 7.6 cmH2O with no significant difference between new-onset and recurrent CSDHs. In 12 patients with a CSDH pressure ≥25 cmH2O, further analyses were carried out. Eight of them had bilateral CSDHs. All six patients with a CSDH pressure ≥28 cmH2O suffered headaches before surgery. Two out of three patients with a CSDH pressure ≥29 cmH2O felt nauseous. In statistical analyses, headache was positively correlated with a high CSDH pressure, whereas age and hematoma thickness were negatively correlated with it. Patients' sex, initial Glasgow coma scale score, motor weakness, midline shift on computed tomography scans, and administration of anticoagulants/antiplatelet agents, showed no significant correlation. When patients with bilateral CSDHs are not older adults and suffering headaches, an increased CSDH pressure should be assumed. For such patients, a prompt hematoma evacuation is indicated.
    MeSH term(s) Humans ; Hematoma, Subdural, Chronic/diagnostic imaging ; Hematoma, Subdural, Chronic/surgery ; Trephining ; Headache/surgery ; Glasgow Coma Scale ; Drainage ; Retrospective Studies
    Language English
    Publishing date 2024-02-13
    Publishing country Scotland
    Document type Journal Article
    ZDB-ID 1193674-5
    ISSN 1532-2653 ; 0967-5868
    ISSN (online) 1532-2653
    ISSN 0967-5868
    DOI 10.1016/j.jocn.2024.02.007
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  2. Article ; Online: Chordae Willisii of the dural sinuses: an anatomical study using magnetic resonance imaging.

    Tsutsumi, Satoshi / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Surgical and radiologic anatomy : SRA

    2024  

    Abstract: Purpose: The chordae Willisii (CWs), trabecular projections into the lumen of the dural sinuses, are not well understood. We aimed to explore them using magnetic resonance imaging (MRI).: Methods: Eighty-five patients underwent volumetric contrast- ... ...

    Abstract Purpose: The chordae Willisii (CWs), trabecular projections into the lumen of the dural sinuses, are not well understood. We aimed to explore them using magnetic resonance imaging (MRI).
    Methods: Eighty-five patients underwent volumetric contrast-enhanced MRI, while another 30 underwent a fluid-attenuated inversion recovery (FLAIR) sequence in the coronal section.
    Results: The CWs were detected as linear filling defects lying in the dural sinuses, adjacent to the surrounding dura mater. They were found in the superior sagittal sinus (SSS) in 68.2% of the patients, most frequently in the middle third, with laminar appearance. In 27.1% of the patients, the CWs divided the SSS lumen into separate channels. The CWs were identified in the transverse sinus, transverse-sigmoid sinus junctional area and sigmoid sinus, and straight sinus in 54.1, 47.1, and 8.2%, respectively. On the FLAIR images, dural septi partially dividing the SSS lumen were identified in all patients. In addition, in 73.3% of the patients, fine linear structures were observed in the lumen with inconstant arrangements.
    Conclusions: The CWs may be constant structures distributed over the lumen of the intracranial dural sinuses. Contrast-enhanced MRI may be useful for detecting laminar CWs. The FLAIR sequence may be advantageous for delineating the dural septi projecting into the lumen of the dural sinuses.
    Language English
    Publishing date 2024-05-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 632839-8
    ISSN 1279-8517 ; 0930-312X ; 0930-1038
    ISSN (online) 1279-8517
    ISSN 0930-312X ; 0930-1038
    DOI 10.1007/s00276-024-03382-1
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  3. Article ; Online: Delineation of the lacrimal vein: a magnetic resonance imaging study.

    Tsutsumi, Satoshi / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Surgical and radiologic anatomy : SRA

    2023  Volume 45, Issue 2, Page(s) 149–157

    Abstract: Purpose: To our knowledge, anatomical knowledge about the lacrimal vein (LV) is missed. Therefore, this retrospective study aimed to explore them using magnetic resonance imaging (MRI).: Materials and methods: Eighty-one patients who underwent ... ...

    Abstract Purpose: To our knowledge, anatomical knowledge about the lacrimal vein (LV) is missed. Therefore, this retrospective study aimed to explore them using magnetic resonance imaging (MRI).
    Materials and methods: Eighty-one patients who underwent contrast-enhanced MRI and three donated bodies to science were enrolled.
    Results: On the sagittal images, the measured mean right long (LD) and short diameters (SD) of the lacrimal gland (LG) were 17.3 ± 2.4 mm and 13.7 ± 2.1 mm, while the left LD and SD were 17.0 ± 2.6 mm and 13.6 ± 2.6 mm, respectively. Laterality or sex differences were not found in the LD and SD groups. In addition, no specific age range was associated with a significantly longer LD or SD. LVs were identified in 94% of axial images. Their course was classified into as follows: three types: connecting to the superolateral cavernous sinus (CS), to the superior ophthalmic vein (SOV), and the diploic channels of the greater wing of the sphenoid bone (DCGW). The CS type was the most frequently identified, followed by the SOV and DCGW types. In dissected specimens, the LVs consistently coursed between the posterior margin of the LG and the superolateral part of the CS, above the upper margin of the lateral rectus muscle.
    Conclusions: The LV may consistently emerge from the upper posterior margin of the LG. It commonly pours into the SOV or superolateral part of the CS.
    MeSH term(s) Humans ; Male ; Female ; Cavernous Sinus ; Retrospective Studies ; Magnetic Resonance Imaging ; Oculomotor Muscles ; Lacrimal Apparatus/diagnostic imaging
    Language English
    Publishing date 2023-01-03
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 632839-8
    ISSN 1279-8517 ; 0930-312X ; 0930-1038
    ISSN (online) 1279-8517
    ISSN 0930-312X ; 0930-1038
    DOI 10.1007/s00276-022-03075-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Do the mammillary bodies atrophy with aging? A magnetic resonance imaging study.

    Tsutsumi, Satoshi / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Surgical and radiologic anatomy : SRA

    2023  Volume 45, Issue 11, Page(s) 1419–1425

    Abstract: Purpose: This retrospective study aimed to explore age-related atrophy of the mammillary bodies (MBs) based on their temporal change using magnetic resonance imaging (MRI).: Materials and methods: The study included 30 adult outpatients who presented ...

    Abstract Purpose: This retrospective study aimed to explore age-related atrophy of the mammillary bodies (MBs) based on their temporal change using magnetic resonance imaging (MRI).
    Materials and methods: The study included 30 adult outpatients who presented to the hospital and were followed for more than 100 months with annual MRIs. The bi-ventricular width (BVW), third ventricle width (TVW), and bi-mammillary dimension (BMD) were measured on axial T2-weighted imaging and analyzed.
    Results: The 30 patients comprised 1 in their 40s, 5 in their 50s, 6 in their 60s, 11 in their 70s, 5 in their 80s, and 2 in their 90s. The MBs were consistently detected with left-to-right symmetry. The mean BVW was 32 ± 2.2 mm on the initial (BVW1) and 32 ± 2.4 mm on the last (BVW2) MRI. The mean TVW was 7.0 ± 2.3 mm on the initial (TVW1) and 7.6 ± 2.7 mm on the last (TVW2) MRI. Furthermore, the mean BMD was 9.9 ± 1.3 mm on the initial (BMD1) and 10 ± 1.3 mm on the last (BMD2) MRI. Statistically, no age ranges had a large dimension for BVW1, BVW2, TVW1, TVW2, BMD1, or BMD2. Changes between TVW1 and TVW2 were significantly different in the patients in their 80s; changes between BMD1 and BMD2 were not different for any age range or between sexes.
    Conclusions: Aging alone does not seem to promote MB atrophy. In healthy brains, the MBs may be stationary structures throughout life.
    Language English
    Publishing date 2023-07-14
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 632839-8
    ISSN 1279-8517 ; 0930-312X ; 0930-1038
    ISSN (online) 1279-8517
    ISSN 0930-312X ; 0930-1038
    DOI 10.1007/s00276-023-03205-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Dural-based large B-cell lymphoma masquerading as a tentorial meningioma.

    Inami, Kasumi / Tsutsumi, Satoshi / Hashizume, Akane / Yamataka, Motoki / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Radiology case reports

    2024  Volume 19, Issue 5, Page(s) 1661–1665

    Abstract: A 53-year-old woman presented with a 2-week history of headache and vertigo. Computed tomography revealed a hyperdense tumor, measuring 30 × 31 × 36 mm in diameter, in the anteromedial parts of the cerebellar hemispheres. Cerebral magnetic resonance ... ...

    Abstract A 53-year-old woman presented with a 2-week history of headache and vertigo. Computed tomography revealed a hyperdense tumor, measuring 30 × 31 × 36 mm in diameter, in the anteromedial parts of the cerebellar hemispheres. Cerebral magnetic resonance imaging 10 days later revealed an apparent extra-axial tumor with broad attachment to the medial tentorium cerebelli and rapid growth to a diameter of 40 × 41 × 46 mm. Cerebral angiography revealed no obvious feeding vessels or tumor stains. The patient underwent biopsy through the left occipital transtentorial route. The histological appearance was consistent with diffuse large B-cell lymphoma. Intracranial lymphoma may present as a dural tumor that mimics a meningioma. Rapid tumor growth incongruous with benign meningiomas should be assumed to be possible lymphoma, and prompt biopsy should be performed.
    Language English
    Publishing date 2024-02-13
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2406300-9
    ISSN 1930-0433
    ISSN 1930-0433
    DOI 10.1016/j.radcr.2024.01.058
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  6. Article: Idiopathic thoracic spinal cord herniation into the vertebra progressing for 3 years.

    Yamataka, Motoki / Tsutsumi, Satoshi / Inami, Kasumi / Sugiyama, Natsuki / Ueno, Hideaki / Ito, Masanori / Ishii, Hisato

    Radiology case reports

    2024  Volume 19, Issue 6, Page(s) 2260–2263

    Abstract: A 43-year-old, previously healthy man experienced a decreased sensation in the left lower extremity without preceding spinal trauma. At presentation, the patient exhibited slight motor weakness in the left lower extremity, in addition to decreased pain ... ...

    Abstract A 43-year-old, previously healthy man experienced a decreased sensation in the left lower extremity without preceding spinal trauma. At presentation, the patient exhibited slight motor weakness in the left lower extremity, in addition to decreased pain sensation below the ipsilateral T7. Spinal magnetic resonance imaging (MRI) revealed abnormal findings consistent with idiopathic thoracic spinal cord herniation (ITSCH) at the T5/6 level. Computed tomography (CT) revealed a small vertebral erosion at the lower T5. The patient's symptoms gradually progressed over the next 3 years. MRI revealed marked lateral elongation of the cord at the T5/6 and apparent intravertebral cord herniation. The patient underwent ITSCH reduction through T5-6 laminectomies. The herniated cord was vertically long with a bulbous rostral part. Successful ITSCH reduction was achieved and the patient's postoperative course was uneventful. ITSCH is a progressive pathology that requires prompt surgical reduction. Certain ITSCHs may be complicated by intravertebral cord herniation.
    Language English
    Publishing date 2024-03-19
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2406300-9
    ISSN 1930-0433
    ISSN 1930-0433
    DOI 10.1016/j.radcr.2024.02.091
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  7. Article: Acute epidural hemorrhage following burr-hole irrigation for chronic subdural hematoma: A possible association with the diploic veins.

    Yamataka, Motoki / Tsutsumi, Satoshi / Inami, Kasumi / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Radiology case reports

    2024  Volume 19, Issue 8, Page(s) 2950–2953

    Abstract: A 50-year-old man presented with headache and left hemiparesis. No noticeable preceding head trauma was observed. Computed tomography (CT) scans revealed a compressive chronic subdural hematoma (CSDH). The patient underwent burr-hole irrigation, during ... ...

    Abstract A 50-year-old man presented with headache and left hemiparesis. No noticeable preceding head trauma was observed. Computed tomography (CT) scans revealed a compressive chronic subdural hematoma (CSDH). The patient underwent burr-hole irrigation, during which he was considerably restless. In addition, extensive avulsion was found in the parietal dura mater posterior to the burr hole. CT performed immediately after the surgery revealed the emergence of a thick epidural hematoma (EDH) located posterior to the burr-hole. During emergency craniotomy for the EDH, there was no identifiable injury to the dura mater or the meningeal vessels. However, a review of the CT scans confirmed well-developed diploic spaces just above the center of the EDH, with connecting channels between the diploic spaces and extracranial sites. Based on these observations, we assumed that the diploic vein might have caused the EDH. Diploic veins can cause AEDH after burr hole irrigation for CSDH. Appropriate intraoperative sedation and protective irrigation maneuvers can reduce the risk of such AEDH.
    Language English
    Publishing date 2024-05-03
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2406300-9
    ISSN 1930-0433
    ISSN 1930-0433
    DOI 10.1016/j.radcr.2024.04.026
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  8. Article ; Online: Diameters of the optic sheath and superior ophthalmic vein can expand and contract at positional changes: a magnetic resonance imaging study.

    Tsutsumi, Satoshi / Kawai, Satoru / Sugiyama, Natsuki / Ueno, Hideaki / Suzuki, Michimasa / Ishii, Hisato

    Surgical and radiologic anatomy : SRA

    2024  Volume 46, Issue 2, Page(s) 153–158

    Abstract: Purpose: This study aimed to explore the diameters of the optic sheath (OSD) and superior ophthalmic vein (SOVD) in response to positional changes using magnetic resonance imaging (MRI).: Materials and methods: Fifty adult outpatients who presented ... ...

    Abstract Purpose: This study aimed to explore the diameters of the optic sheath (OSD) and superior ophthalmic vein (SOVD) in response to positional changes using magnetic resonance imaging (MRI).
    Materials and methods: Fifty adult outpatients who presented to the hospital underwent thin-slice coronal T2-weighted MRI in the supine position followed by the prone position.
    Results: The OS and SOV were well delineated in all the patients. The OSD in the anterior orbit was measured in the supine and prone positions on both sides. In addition, the SOVD in the anterior and posterior orbits was measured in the supine and prone positions on both sides. The OSD demonstrated an increase on both sides in 100% of the cases. The SOVD demonstrated an increase on both sides in 94% of the cases, whereas the remaining 6% demonstrated a decrease. The OSD measured at the anterior orbit and the SOVD at the anterior and posterior orbits significantly increased on both sides with positional changes from the supine to the prone position.
    Conclusion: OSD and SOVD may expand and contract in response to alterations in the intracranial pressure and venous flow patterns. MRI examination in the supine position combined with positional changes can help to better understand the OS and SOV as dynamic structures.
    MeSH term(s) Adult ; Humans ; Magnetic Resonance Imaging/methods ; Orbit/diagnostic imaging ; Orbit/blood supply ; Patient Positioning
    Language English
    Publishing date 2024-01-08
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 632839-8
    ISSN 1279-8517 ; 0930-312X ; 0930-1038
    ISSN (online) 1279-8517
    ISSN 0930-312X ; 0930-1038
    DOI 10.1007/s00276-023-03281-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Does diploic venous flow drain extracranially in the pterional area? A magnetic resonance imaging study.

    Tsutsumi, Satoshi / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Surgical neurology international

    2022  Volume 13, Page(s) 425

    Abstract: Background: To the best of our knowledge, no study using neuroimaging modalities has documented calvarial diploic veins (DVs) connected to the extracranial sites. This study aimed to characterize them using magnetic resonance imaging (MRI).: Methods: ...

    Abstract Background: To the best of our knowledge, no study using neuroimaging modalities has documented calvarial diploic veins (DVs) connected to the extracranial sites. This study aimed to characterize them using magnetic resonance imaging (MRI).
    Methods: A total of 88 patients underwent thin-sliced contrast MRI. In addition, the DVs coursing through the pterional area were observed on three injected cadaver heads.
    Results: On postcontrast MRI, the DVs of the pterional area directly drained into the temporalis muscle or supplied branches coursing into the muscle in 43% on the right side and 40% on the left. The DVs and their branches were highly variable in diameter and number. In 9% of cases, the DV of the pterional area was found to drain into an extracranial site and connected to large venous channels distributed in the temporalis muscle. Furthermore, in 17% of cases, the DVs drained into the extracranial sites in the frontal skull region, followed by 9% in the parietal, 2% in the occipital, and 1% in the temporal regions. The DVs coursed superficially in the pterional area on both sides of all three cadaver heads. On one side, the DV in the area was open to an extracranial site.
    Conclusion: Part of the diploic venous flow drains extracranially in the pterional area. This area may provide an important interface between the calvarial DVs and the extracranial venous system.
    Language English
    Publishing date 2022-09-16
    Publishing country United States
    Document type Journal Article
    ISSN 2229-5097
    ISSN 2229-5097
    DOI 10.25259/SNI_760_2022
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  10. Article ; Online: Delineation of intermammillary relationships using magnetic resonance imaging.

    Tsutsumi, Satoshi / Sugiyama, Natsuki / Ueno, Hideaki / Ishii, Hisato

    Surgical and radiologic anatomy : SRA

    2022  Volume 45, Issue 1, Page(s) 29–34

    Abstract: Purpose: No study has investigated intermammillary relationships using neuroimaging modalities. This study aimed to explore them using magnetic resonance imaging (MRI).: Materials and methods: We enrolled 72 patients who underwent conventional MRI ... ...

    Abstract Purpose: No study has investigated intermammillary relationships using neuroimaging modalities. This study aimed to explore them using magnetic resonance imaging (MRI).
    Materials and methods: We enrolled 72 patients who underwent conventional MRI examinations, followed by constructive interference steady-state sequence in the coronal plane. The intermammillary distances (IMDs) were measured at the uppermost level of the intermammillary gap (IMD
    Results: MBs with varying morphologies were consistently delineated. The appearance of both MBs could be classified into four patterns based on the size and relative levels, with the symmetrical type being the most common. Intermammillary relationships exhibited five patterns. In 69%, the IMD
    Conclusions: Intermammillary relationships show variable morphologies with gaps formed between both MBs. The IMD
    MeSH term(s) Male ; Female ; Humans ; Third Ventricle ; Mammillary Bodies/diagnostic imaging ; Mammillary Bodies/pathology ; Magnetic Resonance Imaging/methods ; Neuroimaging ; Age Distribution
    Language English
    Publishing date 2022-12-20
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 632839-8
    ISSN 1279-8517 ; 0930-312X ; 0930-1038
    ISSN (online) 1279-8517
    ISSN 0930-312X ; 0930-1038
    DOI 10.1007/s00276-022-03063-x
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