Table 5 MRI abnormalities in children with cerebral palsy based on preterm, term, and postnatal onset of insult

AbnormalitiesPreterm (n = 335)Term (n = 272)Postnatal (n = 29)
Data from the following studies: Yin et al., 200016; Okumara et al., 1997, pt 218; Cioni et al., 199919; Sugimoto et al., 199521; Hayakawa et al., 199622; Krageloh-Mann et al., 199515; Yokochi et al., 199124; Candy et al., 199317; Jaw et al., 199820; Truwit et al., 1992.23 Abnormalities considered insults on neuroimaging were designated as preterm (insult occurred before 38 weeks gestation whether infant born prematurely or at term), term (insult occurred after full term gestation in the perinatal period up to 1 month of age), or postnatal (insult occurred after 1 month of age in infants born prematurely or at term). Malformations were categorized as preterm if detected in infants born before 38 weeks gestation or term if detected in infants born after a full term pregnancy.
* The data in the malformations section of this table are separated into preterm, term, and post-term as that is how they were reported in the original reports. It is believed, however, that these malformations occur prenatally.
PVL = periventricular leukomalacia.
Acquired lesions26117822
    PVL with other areas of injury22745
    Diffuse encephalopathy (cortical/subcortical atrophy/ ventriculomegaly)1471
    Focal ischemic/hemorrhagic (e.g., infarct porencephaly)145210
    Multicystic encephalomalacia310
    Trauma (at birth or later)004
    Infection308
Malformations*48550
    Cortical dysplasia/polymicrogyria818
    Schizencephaly611
    Pachygyria/lissencephaly59
    Complex brain malformation2260
    Agenesis/hypoplasia of the corpus callosum33
    Arachnoid cyst10
    Vermian/cerebellar hypoplasia12
    Hydrocephalus/holoprosencephaly/hydranencephaly22
Miscellaneous/unknown23181
    Miscellaneous etiologies2291
    Delayed/abnormal myelination190
Normal3216