Table 4. Classification of MRI findings.
| Type of lesion | n |
|---|---|
| Acquired lesions | 26 |
| MTS | 9 |
| PVL | 5 |
| Gliosis after asphyxia | 3 |
| Rasmussen's encephalitis | 2 |
| Other lesions classified as acquired | 7 |
| Developmental lesions | 38 |
| Malformations of cortical development | 23 |
| Focal cortical dysplasia unilateral | 8 |
| Polymicrogyria | 4 |
| Hemimegalencephaly | 2 |
| Transmantle dysplasia | 2 |
| Hippocampal malrotation | 2 |
| Lissencephaly | 1 |
| Schizencephaly | 1 |
| Holoprosencephaly | 1 |
| Subependymal noduli | 1 |
| Megalencephaly | 1 |
| Other developmental abnormalities | 15 |
| Delay in myelinisation/hypomyelinisation | 5 |
| Atrophy | 3 |
| Paraventricular or arachnoidal cysts | 3 |
| Cerebellar hypoplasia, Chiari-II-malformations | 2 |
| Other | 2 |
| Non-specific, unclassified findings | 18 |
| Nonspecific ventricular enlargement | 5 |
| Nonspecific white matter abnormalities | 5 |
| Other | 8 |
Abbreviations: MRI, magnetic resonance image; MTS, mesial temporal sclerosis; PVL, periventricular leukomalacia.