Prominent publications by Shizuo OI

KOL Index score: 14926

Abstract 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 delineate the racial differences in Japan and in Korea in the epidemiology and recent therapeutic modalities for this tumor group. Among the members of International Society for Pediatric Neurosurgery (ISPN), 15 from Japan and 5 from Korea reported their recent findings in 118 ...

Also Ranks for: Pineal Region |  therapeutic modalities |  japan korea |  germ cell |  adjuvant child child
KOL Index score: 11524

BackgroundThe specificity of cerebrospinal fluid (CSF) dynamics in the immature brain still remains unknown. In our data previously published, the transependymal intraparenchymal CSF pathway (the minor pathway) plays a significant role in various degrees in the alternative CSF passage. Now, there is a growing consensus in the age differences in the outcome of neuroendoscopic ventriculostomy in treatment of non-communicating types of hydrocephalus. The authors discuss the clinical ...

Also Ranks for: Csf Dynamics |  immature brain |  classification hydrocephalus |  cerebrospinal fluid |  major pathway
KOL Index score: 11425

OBJECT: In this study the authors evaluate the safety, efficacy, and indications for endoscopic third ventriculostomy (ETV) in patients with a history of subarachnoid hemorrhage or intraventricular hemorrhage (IVH) and/or cerebrospinal fluid (CSF) infection.

METHODS: The charts of 101 patients from seven international medical centers were retrospectively reviewed; 46 patients had a history of hemorrhage, 42 had a history of CSF infection, and 13 had a history of both disorders. All ...

Also Ranks for: Etv Patients |  cerebrospinal fluid |  hemorrhage infection |  newborn infant |  treatment failure
KOL Index score: 8845

BackgroundVarious surgical techniques for the treatment of craniosynostosis using distraction devices have been described over the last few years and we have applied these procedures in seven patients with varying types of craniosynostosis. The aim of this report is to clarify the advantages and disadvantages of these surgical methods and to discuss current concepts for the surgical strategy in the treatment of craniosynostosis.Material and methodsFrom January 2001 to March 2003, 25 ...

Also Ranks for: Distraction Method |  surgical outcomes |  treatment craniosynostosis |  humans imaging |  apert syndrome
KOL Index score: 8281

OBJECT: The authors present a novel cine magnetic resonance (MR) imaging, two-dimensional (2D) fast imaging employing steady-state acquisition (FIESTA) technique with parallel imaging. It achieves temporal resolution at less than half a second as well as high spatial resolution cine imaging free of motion artifacts for evaluating the dynamic motion of fetuses in utero. The information obtained is used to predict postnatal outcome.

METHODS: Twenty-five fetuses with anomalies were studied. ...

Also Ranks for: Magnetic Resonance |  fast imaging |  fetal motion |  central nervous |  employing steady
KOL Index score: 8171

Slit ventricle syndrome is well known as a complication in the treatment of hydrocephalus by shunting. It is generally considered to be a chronic (but not acute) complication, occurring years after the shunt procedure; there has been no report of this syndrome occurring before 1 year of age. The authors present infantile cases that developed a severe form of this syndrome shortly after shunt procedures and discuss the pathophysiology in comparison to experience with older cases. The ...

Also Ranks for: Slit Ventricle |  1 year |  early infancy |  intracranial pressure |  subtemporal decompression
KOL Index score: 7936

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 231 brain tumors diagnosed in the 1st year of life collected in a cooperative study in Japan, were analyzed. Although astrocytomas were invariably common tumors in each age group, comprising 25.0% for all pediatric brain tumors, teratomas were the most common type of neonatal brain ...

Also Ranks for: Brain Tumors |  newborn infant |  common type |  1st year |  pediatric age groups
KOL Index score: 7764

The management of tumors of the pineal region differs between Western countries and Japan. This paper reports on a worldwide survey of individual experience and regimens for treating pineal region tumors in different patient populations. Fifteen pediatric neurosurgeons from nine different countries participated in the survey, and a total of 408 pineal region tumors were evaluated. Determination of tumor histology as an initial procedure was strongly supported by the majority of ...

Also Ranks for: Patient Populations |  therapeutic modalities |  pineal region |  racial differences |  initial procedure
KOL Index score: 7449

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 clinic. Fourteen of these patients (14.0%) developed delayed symptom(s) of progressive spinal neurologic dysfunction. In those with myeloschisis, increase of motor deficit was the most common clinical manifestation during infancy and early childhood (mean age: 6.8 years), whereas ...

Also Ranks for: Spinal Cord |  conus medullaris |  initial repair |  spina bifida |  lipomeningocele patients
KOL Index score: 7442

Abstract 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 hydrocephalus (IUH), isolated IV ventricle (IFV), disproportionately large IV ventricle (DLFV), isolated rhombencephalic ventricle (IRV), isolated quarto-ventriculomegaly (IQV), dorsal sac in holoprosencephaly (DS), and loculated ventricle (LV). A total of 26 operative ...

Also Ranks for: Neuroendoscopic Surgery |  specific forms |  endoscopic procedure |  patients lova |  monro foramen
KOL Index score: 7259

Case reportWe report a case of central diabetes insipidus, hypothyroidism, and subsequent hypopituitarism due to lymphocytic hypophysitis masking a germinoma in a 13-year-old pubertal girl. Magnetic resonance revealed an enlarged pituitary gland and a mass lesion in the pituitary stalk and inferior hypothalamus. Open cranial surgery of the anterior pituitary showed active hypophysitis with lymphocytic infiltrates but without necrosis. Despite prednisolone therapy, 1 year later an ...

Also Ranks for: Lymphocytic Hypophysitis |  central diabetes |  pituitary gland |  suprasellar germinoma |  magnetic resonance
KOL Index score: 7007

With the dramatic technical advances in neuroimaging, it has become possible to diagnose central nervous system (CNS) anomalies in the fetus in utero with more precise morphological analysis. A new technique, high-resolution magnetic resonance (MR) imaging using heavily T2-weighted fast spin echo sequences, has been reported to solve motion artifact of the fetus. However, it has also been recognized that the morphological fetal CNS findings detected in early development are not always ...

Also Ranks for: Fetal Neurosurgery |  central nervous |  cns anomalies |  perspective classification |  neural placode
KOL Index score: 6576

OBJECT: The current, generally accepted optimal management for hydrocephalus related to vestibular schwannomas (VSs) is primary tumor removal, with further treatment reserved only for patients who remain symptomatic. Previous studies have shown, however, that this management can lead to an increase in surgery-related complications. In this study, the authors evaluated their experience with the treatment of such patients, with the aim of identifying the following: 1) the parameters ...

Also Ranks for: Vestibular Schwannomas |  patients hydrocephalus |  tumor removal |  primary surgery |  cerebrospinal fluid
KOL Index score: 6404

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, and the fetal age at diagnosis ranged between 24 and 40 weeks of gestation (average 33.4 weeks). All were diagnosed using ultrasonography, with either magnetic resonance imaging or whole-body computed tomography, additionally performed in 10 patients to determine their usefulness in ...

Also Ranks for: Fetal Hydrocephalus |  postnatal outcome |  intracranial pressure |  cerebrospinal fluid |  prenatal diagnosis
KOL Index score: 6375

Chronological changes in the neurological manifestations of spina bifida are well recognized in the early developmental periods: fetal, neonatal, infantile, pre-school and school life. However, little has been written about the medical and medico-social problems of spina bifida patients in adulthood. Patients now in this age group had the condition diagnosed and managed in an era when modern neurosurgical concepts were only just beginning to be established with the aid of invasive ...

Also Ranks for: Spina Bifida |  2 patients |  cerebral ventricles |  neurological deterioration |  early infancy

Key People For Fetal Hydrocephalus

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Shizuo OI:Expert Impact

Concepts for whichShizuo OIhas direct influence:Fetal hydrocephalus,  Spina bifida,  Neuroendoscopic surgery,  Congenital hydrocephalus,  Arachnoid cyst,  Moyamoya disease,  Neuronal maturation,  Pineal region tumors.

Shizuo OI:KOL impact

Concepts related to the work of other authors for whichfor which Shizuo OI has influence:Cerebrospinal fluid,  Endoscopic ventriculostomy,  Pineal region,  Arachnoid cysts,  Obstructive hydrocephalus,  Brain tumors,  Fourth ventricle.



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President St. Thomas University, Laureate International Universities Health Sciences Asia Executive Dean, 2-18-1 Nakoji, Amagasaki, Hyogo, Japan | 13Jikei University School of Medicine, Minato-ku, Tokyo, Japan | Health Sciences Asia Executive Dean Of