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1.  Aneurysms of Distal Posterior Inferior Cerebellar Artery 
Objective
Aneurysms are very rarely encountered in the distal posterior inferior cerebellar artery (PICA). The authors experienced 5 cases with a distal PICA aneurysm among 368 cases of intracranial aneurysms during the period from January 2003 to January 2008. Here, the authors describe their clinical and surgical experiences and include a review of the relevant literature.
Methods
Using radiologic findings and charts, we retrospectively reviewed the surgical results of 5 cases with a distal PICA aneurysm treated from January 2003 to January 2008.
Results
The current five cases were composed of four cases of 'Good' and one case of 'Fair'. No postoperative complications occurred other than a ventriculo-peritoneal shunt due to hydrocephalus in Case 2. In all five cases, treatment was successful without neurological deficit.
Conclusion
Surgical outcome of PICA aneurysms have been reported to be excellent because the amount of intraparenchymal injury is limited. More clinical experience, microsurgical technique developments, and endovascular surgery advancements are certain to improve treatment outcomes.
doi:10.3340/jkns.2008.44.4.205
PMCID: PMC2588322  PMID: 19096678
Aneurysm; Distal posterior inferior cerebellar artery; Subarachnoid hemorrhage
2.  Hydrothorax Due to Migration of Ventriculoperitoneal Shunt Catheter 
A cerebrospinal fluid hydrothorax is a very rare complication following ventriculoperitoneal (VP) shunt and usually reported in children. We report a case of 47-year-old woman who developed massive hydrothorax and respiratory distress following intrathoracic migration of distal shunt catheter. After the confirmation of catheter in thoracic cavity using radionuclide shuntogram, the patient was successfully treated with laparoscopic shunt catheter reposition.
doi:10.3340/jkns.2008.43.3.159
PMCID: PMC2588245  PMID: 19096625
Hydrothorax; Ventriculoperitoneal shunt; Hydrocephalus
3.  Terson Syndrome Caused by Intraventricular Hemorrhage Associated with Moyamoya Disease 
Terson syndrome was originally used to describe a vitreous hemorrhage arising from aneurysmal subrarachnoid hemorrhage. Terson syndrome can be caused by intracranial hemorrhage, subdural or epidural hematoma and severe brain injury but is extremely rare in intraventricular hemorrhage associated with moyamoya disease. A 41-year-old man presented with left visual disturbance. He had a history of intraventicular hemorrhage associated with moyamoya disease three months prior to admission. At that time he was in comatose mentality. Ophthalmologic examination at our hospital detected a vitreous hemorrhage in his left eye, with right eye remaining normal. Vitrectomy with epiretinal membrane removal was performed. After operation his left visual acuity was recovered. Careful ophthalmologic examination is mandatory in patients with hemorrhagic moyamoya disease.
doi:10.3340/jkns.2012.51.6.367
PMCID: PMC3424178  PMID: 22949967
Moyamoya disease; Terson syndrome; Intraventricular hemorrhage
4.  Large Ossified Rathke's Cleft Cyst - A Case Report and Review of the Literature - 
We report a rare case of symptomatic Rathke's cleft cyst with thick calcified wall. Brain CT scans revealed a large cystic mass with round thick calcified wall. In this case, we selected the pterional approach instead of transsphenoidal approach due to the possibility of cystic craniopharyngioma. Histopathologically, it was calcified Rathke's cleft cyst with focal epithelial metaplasia. This case illustrates that calcification of the suprasellar cyst does not always suggest craniopharyngioma and the calcification pattern of Rathke's cleft cyst is different from that of the craniopharyngioma.
doi:10.3340/jkns.2008.44.4.256
PMCID: PMC2588325  PMID: 19096687
Rathke's cleft cyst; Calcification
5.  Unusual Intracranial Parasagittal Meningioma Extending into the Internal Jugular Vein through the Sinuses 
Meningiomas frequently invade cerebral venus sinuses, especially parasagittal meningioma to superior sagittal sinus. However, most invasions do not reach internal jugular vein. We present a case of parasagittal meningioma extending into the internal jugular vein through the sinuses. Radiological investigation revealed that the tumor was invading the sagittal, transverse, sigmoid sinus and junction of the internal jugular vein to subclavian vein, which was filled with tumor. The histopathological examinations revealed that both the cerebral tumor and mass in the internal jugular vein contributed to the transitional meningioma. This is a rare case of a meningioma extending into the internal jugular vein through the sinuses. According to this case, the frontal parasagittal meningioma could invade directly the internal jugular vein. The significance of this association to cerebral venus sinuses and internal jugular vein are discussed.
doi:10.3340/jkns.2008.43.5.250
PMCID: PMC2588220  PMID: 19096607
Meningioma; Jugular vein; Cranial venous sinus

Results 1-5 (5)