Among 24 study subjects (MRI done in 10 patients) who had abnormal MRI brain, 50% had acute meningoencephalitis, 12.5 % showed acute viral encephalitis, 8.3% showed intra cranial bleeding, 4.1 % showed acute leptomeningitis with subdural effusion and rest 24 % showed others type of brain abnormality like Included Agenesis of corpus callosum, Colpocephaly with mega cisterna magna, Colpocephaly, Lissencephaly, Porencephalic
cyst in right cerebral hemisphere, Schizencephaly.
These were periventricular leukomalacia (4%), left hippocampal sclerosis (2%), cerebellar dysgenesis and thinning of brainstem (2%), encephalomalacia (1%), bilateral occipital gliosis (1%), bilateral hippocampal sclerosis (1%), cerebral atrophy (1%), porencephalic
cyst (1%), left occipital gliosis (1%), and left parahippocampal arachnoid cyst (1%) (6).
Differential diagnosis includes arachnoid cyst, porencephalic
cyst, dermoid/epidermoid cyst, low grade cystic neoplasm (eg, ganglioglioma, DNET), and parasitic cyst (eg, hydatid disease).
Among focal lesions; the prevalence were determined as of tumor 0.9% (n:2), porencephalic
cyst 1.36% (n:3), venous angioma 1.36% (n:3) and hippocampal sclerosis 0.9% (n:2) respectively.
The sketch depicts clear criteria for (a') physiologic variants (1 = sharp lateral angle, 2 = concave bottom, 3 = smooth inner lining, and 4 = regular echogenicity of the parenchyma in this case) and (b') pathologic variants (1 = blunt/obtuse lateral angle, 2 = convexly shaped bottom, 3 = irregular inner lining, and 4 = asymmetry, atrophy, and porencephalic
cysts as additional findings in this case) of mild enlargements of the lateral ventricle (modified illustration, ).
Cerebrospinal fluid otorrhea caused by porencephalic
cyst: A rare case report and literature review.
An MRI scan revealed a condition called a porencephalic
cyst that had increased the fluid levels at the base of one side of his brain.
To our knowledge, this is the first case of a simple partial seizure caused by an acquired porencephalic
cyst, which initially presented with involuntary movements of the left upper limb.
The cyst of DWM rarely extends posteriorly to almost completely fill the entire posterior fossa, which mimics primary cerebellar agenesis , a cerebellar porencephalic
cyst , and an arachnoid cyst  due to the lack of clarity of the thin cystic wall; however, an accurate differential diagnosis is critical for selecting an appropriate surgical intervention.
The anatomical recognition of this variant becomes important for the occurrence of saccular aneurysms, relatively common (13-71%), associated malformations (dysgenesis of the corpus callosum, lobar holoprosencephaly, septooptic dysplasia, porencephalic
cysts, and arteriovenous malformations), and presence of bifrontal infarctions in case of occlusion .
 Significant brain injury caused by ventriculitis, brain abscesses or porencephalic
cysts is described in the majority of infants with meningitis.
After 10 months right spastic hemiplegia was diagnosed and an arterial ischemic infarction with a porencephalic
cyst in the central and paraventricular left white matter was confirmed by magnetic resonance imaging (MRI).