Arachnoid cyst can be defined as cerebral-spinal fluid entrapment within the central
nervous system. It may occur primarily as a congenital malformation or secondary as
a complication following trauma, infection, bleeding, or surgical manipulation. Congenital
arachnoid cyst usually asymptomatic and cause no pressure symptoms. No treatment is
needed unless size increase and cause pressure symptoms and increased intracranial
pressure. We report a case presented to the hospital with neurological signs of increased
intracranial pressure, 3 years Post aborted craniotomy for meningioma resection. Radiological
imaging showed postoperative newly developed arachnoid cyst with mass effect. He underwent
the urgent cerebral spinal fluid diversionary procedure with cystoperitoneal shunt.
Key-words:
Arachnoid cyst - complication - congenital - craniotomy - secondary
