Intracranial arachnoid cysts (ACs) represent an extremely common condition in pediatric pathology. With the development of CT Scan and especially MRI these cysts could be find more constantly. ACs are congenital lesions with maximum frequency in middle cranial fossa, followed by supraselar aria , ponto-cerebelar angle and cranial posterior fossa. These cysts are often incidentally uncovered during a routine neuroimaging investigations for cranio-cerebral trauma or other diseases. The authors present a series of 317 cases in children with ACs over a period of 10 years. The authors avocate over the MRI evaluation of Acs and refering to therapeutic approach it is recomanded only in compresive forms with focal neurologica sings or seizures. Are rewiewed therapeutical procedures as: microsurgical fenestration with cystwall excision, endoscopic approach, stereotaxic suction, cyst shunting by cysto-peritoneal procedures. A number of cases remain under observation the surgical treatment beeing unnecesary. The surgical treatment must be carfuly chosen, there is non therapeutical priority. It remains that improved neuroendoscopic methods to improve operator prognosis in Acs
