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The ELGAN study of the brain and related disorders in extremely low gestational age newborns O'Shea TM; Allred EN; Dammann O; Hirtz D; Kuban KC; Paneth N; Leviton AEarly Hum Dev 2009[Nov]; 85 (11): 719-25BACKGROUND: Extremely low gestational age newborns (ELGANs) are at increased risk for structural and functional brain abnormalities. AIM: To identify factors that contribute to brain damage in ELGANs. STUDY DESIGN: Multi-center cohort study. SUBJECTS: We enrolled 1506 ELGANs born before 28 weeks gestation at 14 sites; 1201 (80%) survived to 2 years corrected age. Information about exposures and characteristics was collected by maternal interview, from chart review, microbiologic and histological examination of placentas, and measurement of proteins in umbilical cord and early postnatal blood spots. OUTCOME MEASURES: Indicators of white matter damage, i.e. ventriculomegaly and echolucent lesions, on protocol cranial ultrasound scans; head circumference and developmental outcomes at 24 months adjusted age, i.e., cerebral palsy, mental and motor scales of the Bayley Scales of Infant Development, and a screen for autism spectrum disorders. RESULTS: ELGAN Study publications thus far provide evidence that the following are associated with ultrasongraphically detected white matter damage, cerebral palsy, or both: preterm delivery attributed to preterm labor, prelabor premature rupture of membranes, or cervical insufficiency; recovery of microorganisms in the placenta parenchyma, including species categorized as human skin microflora; histological evidence of placental inflammation; lower gestational age at delivery; greater neonatal illness severity; severe chronic lung disease; neonatal bacteremia; and necrotizing enterocolitis. CONCLUSIONS: In addition to supporting a potential role for many previously identified antecedents of brain damage in ELGANs, our study is the first to provide strong evidence that brain damage in extremely preterm infants is associated with microorganisms in placenta parenchyma.|*Infant, Extremely Low Birth Weight/growth & development/physiology[MESH]|*Infant, Premature/growth & development/physiology[MESH]|Adult[MESH]|Brain Diseases/complications/congenital/diagnosis/*etiology[MESH]|Bronchopulmonary Dysplasia/complications/epidemiology[MESH]|Child Development/physiology[MESH]|Cohort Studies[MESH]|Female[MESH]|Gestational Age[MESH]|Humans[MESH]|Infant, Newborn[MESH]|Infant, Premature, Diseases/diagnosis/epidemiology/*etiology[MESH]|Perinatal Care[MESH]|Placenta Diseases/epidemiology[MESH]|Pregnancy[MESH]|Pregnancy Complications, Infectious/epidemiology[MESH]|Risk Factors[MESH]|Young Adult[MESH] |