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15 Result(s)

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  1. No Access

    Article

    Fetal arachnoid cyst of the quadrigeminal cistern in MRI and ultrasound

    The authors report a fetus with an arachnoid cyst of the quadrigeminal cistern without hydrocephalus at 30 gestational weeks.

    Y. Kusaka, W. Luedemann, S. Oi, R. Shwardfegar, M. Samii in Child's Nervous System (2005)

  2. No Access

    Article

    Fetal central nervous system pathology

    A. Pierre-Kahn, S. Oi, C. Raybaud in Child's Nervous System (2003)

  3. No Access

    Article

    Distribution of intracellular and extracellular water molecules in develo** rat's midbrain: comparison with fraction of multicomponent T 2 relaxation time and morphological findings from electron microscopic imaging

    In the present study, we examined the behavior and state of water molecules in immature and mature rat brains by measuring the components of magnetic resonance (MR) water proton transverse relaxation time (T ...

    M. Matsumae, S. Oi, H. Watanabe, K. Okamoto, Y. Suzuki, K. Sato… in Child's Nervous System (2003)

  4. No Access

    Article

    Neuroendoscopic surgery for specific forms of hydrocephalus

    Neuroendoscopic surgery was used to treat patients with various forms of hydrocephalus with specific pathophysiology, including long-standing overt ventriculomegaly in adulthood (LOVA), isolated unilateral hy...

    S. Oi, Mitsuru Hidaka, Yumie Honda, Koji Togo, Masaki Shinoda… in Child's Nervous System (1999)

  5. No Access

    Article

    Hydrocephalus chronology in the fetus: pathophysiology of aqueductal stenosis and morphological findings in animal models Reply to the letter from Dr. H. C. Jones

    S. Oi in Child's Nervous System (1998)

  6. No Access

    Article

    Sinusoidal Intrathecal Infusion for Assessment of CSF Dynamics in Kaolin-Induced Hydrocephalus

    Objective. To evaluate whether changes of CSF outflow resistance and compliance in hydrocephalus can be assessed by an intrathecal infusion which is performed at a sinusoidal varying rate.

    T. Brinker, H. Beck, P. Klinge, B. Kischnik, S. Oi, M. Samii in Acta Neurochirurgica (1998)

  7. No Access

    Article

    Identical characteristics of the patient populations with pineal region tumors in Japan and in Korea and therapeutic modalities

    The therapeutic modalities used for tumors of the pineal region in Western countries differ from those in Japan, mainly because of the different patient populations. An extensive survey was conducted to delin...

    S. Oi, Kazuhito Matsuzawa, Joong-Uhn Choi, Dong-Seok Kim… in Child's Nervous System (1998)

  8. No Access

    Article

    Experimental models of congenital hydrocephalus and comparable clinical problems in the fetal and neonatal periods

    Morphological and developmental changes of the ventricular system are analyzed in three major experimental models of congenital hydrocephalus in the rat: 6-aminonicotinamide (6-AN)-induced and LEW/Jms and HTX ...

    S. Oi, O. Sato, H. Yamada, S. Matsumoto in Child's Nervous System (1996)

  9. No Access

    Chapter and Conference Paper

    The Efficacy of Shunting the Hydrocephalic Edema

    The efficacy of shunting the hydrocephalic edema was evaluated by means of transmission electromicroscopical observation (TEM) comparing ultrastructual alterations seen in either valid or invalid shunted felin...

    Futoshi Takei M.D., K. Shapiro, S. Oi, O. Sato in Brain Edema IX (1994)

  10. No Access

    Article

    Ependymoma diagnosed in the first year of life in Japan in collaboration with the International Society for Pediatric Neurosurgery

    During 1987, 23 survey forms for ependymoma cases diagnosed in the 1st year of life were selected from 88 neurosurgical institutes in Japan in collaboration with the International Society for Pediatric Neurosu...

    H. Kudo, S. Oi, N. Tamaki, Y. Nishida, S. Matsumoto in Child's Nervous System (1990)

  11. No Access

    Article

    Pathophysiology and postnatal outcome of fetal hydrocephalus

    At the National Kagawa Children's or Kobe University Hospital, 24 cases of fetal hydrocephalus were managed between 1982 and 1988. There were 8 simple, 11 dysgenetic, and 5 secondary cases of hydrocephalus, an...

    S. Oi, S. Matsumoto, K. Katayama, M. Mochizuki in Child's Nervous System (1990)

  12. No Access

    Article

    Morphological evaluation for neuronal maturation in anencephaly and encephalocele in human neonates

    The developmental pathogenesis of cranium bifidum and exencephaly, as well as other forms of the dysraphic state, remains unresolved. The process of neuronal maturation under such conditions is the major defin...

    S. Oi, S. Matsumoto in Child's Nervous System (1990)

  13. No Access

    Article

    Tethered cord syndrome versus low-placed conus medullaris in an over-distended spinal cord following initial repair for myelodysplasia

    We present findings obtained from a total of 100 patients who had previously undergone surgery for spina bifida and whose progress had been monitored by magnetic resonance imaging (MRI) in our meningomyelocele...

    S. Oi, H. Yamada, S. Matsumoto in Child's Nervous System (1990)

  14. No Access

    Article

    Brain tumors diagnosed in the first year of life in five Far-Eastern countries

    A statistical survey is presented of brain tumors diagnosed in the first year of life (from five Far-Eastern countries) in relation to the racial differences in tumor types, congenital factors, and general cli...

    S. Oi, S. Matsumoto, J. U. Choi, J. K. Kang, T. Wong, C. Wang… in Child's Nervous System (1990)

  15. No Access

    Article

    Congenital brain tumors in Japan (ISPN Cooperative Study): specific clinical features in neonates

    The authors present specific clinical features of brain tumors occurring in immature brain in comparison with those of older infants and children. Twenty-six neonatal brain tumors, which accounted for 11.3% of...

    S. Oi, T. Kokunai, S. Matsumoto in Child's Nervous System (1990)