The differential diagnosis included the following conditions: neuroglial cyst, arachnoid cyst, schizencephaly, and ependymal cyst
. The diagnosis of porencephaly can easily be missed, since other intracranial cysts can mimic this condition.
The onset symptom (the syncope) as seen in our case was previously described in literature as being related to a cyst in a case of an ependymal cyst in cerebello-pontine angle; in two different cases of hydatid cysts; in a case of dermoid cyst as in present case but located in sacral area, not an ovarian cyst.5-7 Many cases are discovered based on a fainting episode because of blood pressure and neurological disturbances.
An Ependymal Cyst in Cerebello- Pontine Angle Presenting with Syncope.
In another incidence, a patient presenting with depression and schizophrenia-like symptoms was found to have an intraventricular ependymal cyst. The lesion was resected through craniectomy and endoscopy, with subsequent remission of symptoms .
Hirohata et al., "Endoscopic resection of intraventricular ependymal cyst presenting with psychosis," Surgical Neurology, vol.
Kim, "Spinal intramedullary ependymal cyst: a case report and review of the literature," Journal of Korean Neurosurgical Society, vol.
Wu, "Ependymal cyst with hemorrhage in the cerebellopontine angle," Journal of Clinical Neuroscience, vol.
Intraventricular neurocysticercosis must be differentiated from choroid plexus cysts, ependymal cysts, and colloidal cysts.
Ependymal Cysts. Ependymal cysts are usually common benign cysts of the lateral ventricles.
2003 20 Colloid cyst (20)  Colloid cyst (11), ependymal cyst
(2), choroid plexus Husain et al.
are common benign cysts noted in the atrium of lateral ventricle.
The differential diagnosis seen on MRI includes ganglion cysts, ependymal cysts
, synovial cysts, epidermoid cysts or dermoid cysts, enterogenous cysts, teratogenous cysts, hydatid cysts, and intervertebral disc cysts (5,6).