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  1. AU="Nomiyama, Keita"
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  1. Article ; Online: Coexistence of gastric and pulmonary MALT lymphoma and a clonally related, disseminated large B cell lymphoma with conspicuous angiotropism.

    Yoshida-Sakai, Nao / Oe, Kensuke / Kimura, Yoshizo / Ureshino, Hiroshi / Nomiyama, Keita / Hashiguchi, Michitoshi / Jojima, Hiroto / Imamura, Yutaka / Ohshima, Koichi / Okamura, Takashi

    Annals of hematology

    2022  Volume 101, Issue 6, Page(s) 1383–1385

    MeSH term(s) Helicobacter Infections/complications ; Helicobacter pylori ; Humans ; Lymphoma, B-Cell, Marginal Zone/complications ; Lymphoma, B-Cell, Marginal Zone/pathology ; Lymphoma, Large B-Cell, Diffuse/pathology ; Lymphoma, Non-Hodgkin ; Stomach Neoplasms/complications ; Stomach Neoplasms/pathology
    Language English
    Publishing date 2022-02-23
    Publishing country Germany
    Document type Letter
    ZDB-ID 1064950-5
    ISSN 1432-0584 ; 0939-5555 ; 0945-8077
    ISSN (online) 1432-0584
    ISSN 0939-5555 ; 0945-8077
    DOI 10.1007/s00277-022-04752-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Anterior cerebral artery variations detected by MR angiography.

    Uchino, Akira / Nomiyama, Keita / Takase, Yukinori / Kudo, Sho

    Neuroradiology

    2006  Volume 48, Issue 9, Page(s) 647–652

    Abstract: Introduction: From anatomical and angiographic studies, it is well known that there are several variations of the anterior cerebral artery (ACA). However, ACA variations have rarely been studied by magnetic resonance (MR) angiography. The purpose of ... ...

    Abstract Introduction: From anatomical and angiographic studies, it is well known that there are several variations of the anterior cerebral artery (ACA). However, ACA variations have rarely been studied by magnetic resonance (MR) angiography. The purpose of this study was to investigate not only the type, location, configuration, and incidence of ACA variations, but also coexisting arterial pathology such as aneurysms detected by cranial MR angiography.
    Methods: We retrospectively reviewed cranial MR angiography images of 891 patients at our institution. All images were obtained with one of two 1.5-T scanners using the three-dimensional time-of-flight technique. Maximum intensity projection (MIP) images in the horizontal rotation view were displayed stereoscopically. We reviewed these horizontal MIP images, inferosuperior MIP images, and source images, and identified variations of the ACA.
    Results: We found 50 instances (5.6%) of unilateral A1 segment aplasia, 27 (3.0%) of three A2 segments, 18 (2.0%) of an unpaired A2 segment, and 11 (1.2%) fenestrations of the A1 and/or A2 segment. Seven anterior communicating artery (ACoA) aneurysms and one ACA territory embolic infarction were found among the 50 patients with unilateral A1 segment aplasia. One ACoA aneurysm and one pericallosal infarction were found in the 27 patients with three A2 segments. Two distal ACA aneurysms were detected among the 18 patients with an unpaired A2 segment. No associated aneurysm was seen at the fenestrations.
    Conclusion: Although the clinical significance of ACA variations is usually minor, an associated aneurysm is found relatively frequently. Thus, recognizing ACA variations during the interpretation of cranial MR angiograms is important.
    MeSH term(s) Adolescent ; Adult ; Aged ; Aged, 80 and over ; Anterior Cerebral Artery/abnormalities ; Cerebral Infarction/complications ; Cerebral Infarction/diagnosis ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Intracranial Aneurysm/complications ; Intracranial Aneurysm/diagnosis ; Magnetic Resonance Angiography ; Male ; Middle Aged
    Language English
    Publishing date 2006-09
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 123305-1
    ISSN 1432-1920 ; 0028-3940
    ISSN (online) 1432-1920
    ISSN 0028-3940
    DOI 10.1007/s00234-006-0110-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Intracavernous fenestration of the internal carotid artery.

    Uchino, Akira / Nomiyama, Keita / Takase, Yukinori / Kohata, Tomohiko / Kudo, Sho

    European radiology

    2006  Volume 16, Issue 7, Page(s) 1623–1624

    MeSH term(s) Aged ; Angiography, Digital Subtraction ; Carotid Artery Diseases/diagnosis ; Carotid Artery, Internal/abnormalities ; Carotid Artery, Internal/diagnostic imaging ; Carotid Artery, Internal/pathology ; Humans ; Magnetic Resonance Angiography ; Male
    Language English
    Publishing date 2006-01-12
    Publishing country Germany
    Document type Case Reports ; Letter
    ZDB-ID 1085366-2
    ISSN 1432-1084 ; 0938-7994 ; 1613-3749
    ISSN (online) 1432-1084
    ISSN 0938-7994 ; 1613-3749
    DOI 10.1007/s00330-005-0104-2
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  4. Article: Fenestration of the middle cerebral artery detected by MR angiography.

    Uchino, Akira / Takase, Yukinori / Nomiyama, Keita / Egashira, Ryoko / Kudo, Sho

    Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine

    2005  Volume 5, Issue 1, Page(s) 51–55

    Abstract: Unlike fenestration of the posterior cerebral arterial circulation, fenestration of the anterior cerebral arterial circulation has not been well described. We investigated the location and configuration of fenestration of the middle cerebral artery (MCA) ...

    Abstract Unlike fenestration of the posterior cerebral arterial circulation, fenestration of the anterior cerebral arterial circulation has not been well described. We investigated the location and configuration of fenestration of the middle cerebral artery (MCA) detected by magnetic resonance (MR) angiography. We found 6 fenestrations of the MCA among cranial MR angiography images obtained from about 2,000 patients during the past 9 years at our institution using either of two 1.5T imagers. All images were obtained by the three-dimensional time-of-flight technique. Maximum-intensity projection images in the horizontal rotation view were displayed stereoscopically. All 6 fenestrations had small slit-like configurations, five located at the proximal M1 segment, the other, at the middle M1 segment. No associated aneurysm was found. Although MCA fenestration is extremely rare and cerebral artery fenestration usually has no clinical significance, an aneurysm can arise at the proximal end of the fenestration. Thus, recognizing MCA fenestration is important when interpreting cranial MR angiograms.
    MeSH term(s) Adolescent ; Aged ; Female ; Humans ; Magnetic Resonance Angiography/methods ; Male ; Middle Aged ; Middle Cerebral Artery/pathology
    Language English
    Publishing date 2005-08-25
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2217833-8
    ISSN 1880-2206 ; 1347-3182
    ISSN (online) 1880-2206
    ISSN 1347-3182
    DOI 10.2463/mrms.5.51
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  5. Article: Retrograde flow in the dural sinuses detected by three-dimensional time-of-flight MR angiography.

    Uchino, Akira / Nomiyama, Keita / Takase, Yukinori / Nakazono, Takahiko / Tominaga, Yukiko / Imaizumi, Takeshi / Kudo, Sho

    Neuroradiology

    2007  Volume 49, Issue 3, Page(s) 211–215

    Abstract: Introduction: Retrograde flow in the left dural sinuses is sometimes detected by three-dimensional time-of-flight (3D-TOF) magnetic resonance (MR) angiography. The purpose of this study was to evaluate the incidence of this phenomenon and its ... ...

    Abstract Introduction: Retrograde flow in the left dural sinuses is sometimes detected by three-dimensional time-of-flight (3D-TOF) magnetic resonance (MR) angiography. The purpose of this study was to evaluate the incidence of this phenomenon and its characteristic features on 3D-TOF MR angiograms.
    Methods: We retrospectively reviewed cranial MR angiography images of 1,078 patients examined at our institution. All images were obtained by the 3D-TOF technique with one of two 1.5-T scanners. Maximum intensity projection (MIP) images in the horizontal rotation view were displayed stereoscopically. We reviewed the source images, inferosuperior MIP images, and horizontal MIP images and identified retrograde flow in the dural sinuses.
    Results: We found retrograde flow in the dural sinuses of 67 patients on the source images from 3D-TOF MR angiography; the incidence was 6.2%. In 47 of the 67 patients, retrograde flow was identified in the left inferior petrosal sinus, in 13, it was seen in the left sigmoid sinus, and in 6, it was seen in the left inferior petrosal and left sigmoid sinuses. The remaining patient had retrograde flow in the left inferior petrosal and left and right sigmoid sinuses. The mean age of the patients with retrograde flow was slightly greater than that of the patients without this phenomenon (70 years vs 63 years).
    Conclusion: Retrograde flow in the dural sinuses frequently occurs on the left side in middle-aged and elderly patients during 3D-TOF MR angiography performed with the patient in the supine position. This phenomenon should not be misdiagnosed as a dural arteriovenous fistula.
    MeSH term(s) Adolescent ; Adult ; Aged ; Aged, 80 and over ; Brachiocephalic Veins/physiopathology ; Chi-Square Distribution ; Child ; Child, Preschool ; Cranial Sinuses/physiopathology ; Female ; Humans ; Imaging, Three-Dimensional ; Incidence ; Infant ; Infant, Newborn ; Magnetic Resonance Angiography/methods ; Male ; Middle Aged ; Retrospective Studies
    Language English
    Publishing date 2007-03
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 123305-1
    ISSN 1432-1920 ; 0028-3940
    ISSN (online) 1432-1920
    ISSN 0028-3940
    DOI 10.1007/s00234-006-0186-9
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 658: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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  6. Article: Diffuse cranial nerve and cauda equina lesions associated with breast cancer.

    Nomiyama, Keita / Uchino, Akira / Yakushiji, Yusuke / Kosugi, Masafumi / Takase, Yukinori / Kudo, Sho

    Clinical imaging

    2007  Volume 31, Issue 3, Page(s) 202–205

    Abstract: We report on the case of a patient with breast cancer with diffuse cranial nerve and cauda equina lesions. Magnetic resonance imaging of the patient's brain and spinal cord showed diffuse abnormal enhancement and slight enlargement of the cranial nerves ... ...

    Abstract We report on the case of a patient with breast cancer with diffuse cranial nerve and cauda equina lesions. Magnetic resonance imaging of the patient's brain and spinal cord showed diffuse abnormal enhancement and slight enlargement of the cranial nerves and cauda equina. Although the results of subsequent testing for two antineural antibodies were negative, paraneoplastic sensorimotor neuropathy associated with breast cancer was considered to be the most likely clinical diagnosis.
    MeSH term(s) Breast Neoplasms/complications ; Cauda Equina ; Cranial Nerve Diseases/diagnosis ; Cranial Nerve Diseases/etiology ; Female ; Humans ; Magnetic Resonance Imaging ; Middle Aged ; Paraneoplastic Syndromes, Nervous System/diagnosis ; Paraneoplastic Syndromes, Nervous System/etiology ; Peripheral Nervous System Diseases/diagnosis ; Peripheral Nervous System Diseases/etiology
    Language English
    Publishing date 2007-05
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 1028123-x
    ISSN 0899-7071
    ISSN 0899-7071
    DOI 10.1016/j.clinimag.2007.01.006
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    Zs.A 1469: Show issues Location:
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  7. Article: Ipsilateral mamillary body atrophy after infarction of the posterior cerebral artery territory: MR imaging.

    Uchino, Akira / Sawada, Akihiro / Takase, Yukinori / Nomiyama, Keita / Egashira, Ryoko / Kudo, Sho

    European radiology

    2005  Volume 15, Issue 11, Page(s) 2312–2315

    Abstract: We describe herein magnetic resonance (MR) features of ipsilateral mamillary body atrophy after infarction of the posterior cerebral artery (PCA) territory. During the period May 2000 through July 2004, 13 patients with infarction of the PCA territory ... ...

    Abstract We describe herein magnetic resonance (MR) features of ipsilateral mamillary body atrophy after infarction of the posterior cerebral artery (PCA) territory. During the period May 2000 through July 2004, 13 patients with infarction of the PCA territory underwent cranial MR imaging in the chronic stage. Two 1.5-T scanners were used to obtain axial T1- and T2-weighted images with conventional spin-echo and fast spin-echo pulse sequences, respectively. The slice thickness was 6 mm, with a 2-mm interslice gap. Five of the 13 patients with PCA territory infarction had ipsilateral mamillary body atrophy. However, this asymmetry of the mamillary bodies was unclear in two of the five patients because of the thickness of the axial image slices. All five patients had a temporo-parieto-occipital infarction. The remaining eight patients had a parieto-occipital or an occipital infarction. Unilateral transneuronal mamillary body degeneration after infarction of the ipsilateral PCA territory including the posteromedial temporal lobe can be detected on conventional thick axial MR images.
    MeSH term(s) Aged ; Aged, 80 and over ; Atrophy/etiology ; Atrophy/pathology ; Female ; Humans ; Infarction, Posterior Cerebral Artery/complications ; Magnetic Resonance Imaging ; Male ; Mammillary Bodies/pathology ; Middle Aged
    Language English
    Publishing date 2005-04-26
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1085366-2
    ISSN 1432-1084 ; 0938-7994 ; 1613-3749
    ISSN (online) 1432-1084
    ISSN 0938-7994 ; 1613-3749
    DOI 10.1007/s00330-005-2780-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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