ASSOCIATION OF A VERMIAN DERMOID CYST AND A CEREBELLOPONTINE ANGLE ARACHNOID CYST IN A CHILD: A Case Report and Literature Review

We report an exceptional case of an association between a vermian dermoid cyst and a cerebellopontine angle arachnoid cyst. The patient is a 5-year-old girl presenting with intracranial hypertension syndrome, static cerebellar syndrome, and lateral deviation of the eyes. CT and MRI investigations revealed a vermian dermoid cyst, a compressive cerebellopontine angle arachnoid cyst, and active triventricular hydrocephalus. The patient underwent neurosurgical management in three stages: ventriculoperitoneal shunt as a first step, surgical approach to the dermoid cyst as a second step, and surgical treatment of the arachnoid cyst as a third step. Postoperative clinical outcome was satisfactory. Follow-up imaging confirmed total removal of the dermoid cyst and collapse of the arachnoid cyst. The outcome at 3 years was satisfactory. 

Keywords: arachnoid cyst; dermoid cyst; hydrocephalus; posterior cranial fossa.