Endoscopic treatment of in utero diagnosed suprasellar arachnoid cyst and development of salt wasting.

Suprasellar arachnoid cysts are rare lesions that constitute approximately 5-12.5% of all arachnoid cysts. We present a male infant diagnosed in utero with suprasellar arachnoid cyst and treated with endoscopic ventriculocystocisternotomy on the 38th day of life. The patient developed hyponatremia as a result of cerebral salt wasting after the operation.