Norihisa Koyama

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BACKGROUND Although administration of a water-soluble contrast enema has been recognized to be effective for meconium-related ileus, there have been no definitive management guidelines for very low-birthweight infants. METHODS Between 1998 and 2004, 10 infants without cystic fibrosis were treated for meconium-related ileus at Toyohashi Municipal Hospital.(More)
OBJECTIVE Recently, COL4A1 mutations have been reported in porencephaly and other cerebral vascular diseases, often associated with ocular, renal, and muscular features. In this study, we aimed to clarify the phenotypic spectrum and incidence of COL4A1 mutations. METHODS We screened for COL4A1 mutations in 61 patients with porencephaly and 10 patients(More)
BACKGROUND The sudden appearance of hypotension and oliguria without obvious cause following stable circulation and respiration in preterm infants is frequent in Japan. Such episodes are referred to as late-onset circulatory dysfunction of premature infants (LCD). Volume expanders and inotropic agents are often ineffective against this condition, whereas(More)
The incidence of late-onset circulatory dysfunction (LCD) of premature infants, which is characterized by sudden hypotension and oliguria, has recently increased in Japan. This condition suddenly occurs after several days of age without obvious causes in preterm infants with stable respiration and circulation. Intravenous steroids frequently improve the(More)
PURPOSE Ohtahara syndrome is one of the most severe and earliest forms of epilepsy and is frequently associated with brain malformations, such as hemimegalencephaly. Recently, longer expansion of the first polyalanine tract of ARX was found to be causative for Ohtahara syndrome without brain malformation, whereas premature termination mutations of ARX were(More)
We report a case of nemaline myopathy with KLHL40 mutation, presenting as congenital totally locked-in state. At birth, a male patient developed hydrops fetalis, which was diagnosed based on the generalized edema and pleural effusion and could perform no significant spontaneous movements. His eyes were open, without blinking, and the eyeballs were locked in(More)
To investigate the pathophysiology of the neonatal pulmonary emphysema, we assayed platelet activating factor (PAF) in the tracheal aspirates of the low birth weight infants. A total of 29 neonates (birth weight <1750 g) who required mechanical ventilation were enrolled. Tracheal aspirates were obtained within 48 h and blood samples collected within 24 h of(More)
Medium-chain acyl-CoA dehydrogenase deficiency (MCADD) is rare among Asian individuals, and the clinical course and biochemical findings remain unclear. We report herein a 3-year-old Japanese girl with MCADD. The diagnosis was suggested by acylcarnitine profiles and confirmed by enzyme activity and genetic analysis after clinical presentation. Our described(More)
Mutations in the PAX6 gene of Japanese aniridia patients were analyzed. Four types of mutations including one known (474delC) and three novel (786_787ins10, 678_688del11 and 572_575delAATCins14) were found in six patients from four families. A patient with the mutation 572_575delAATCins14 also manifested VATER association. This is the first case of aniridia(More)