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  The diagnostic tests include several imaging studies like plain radiograph which shows the curved appearance of the residual sacrum, scalloped beneath the defect, this finding is considered as almost pathognomonic, and is present in 50% of cases.\cite{3335662} CT-scans are useful to display bony anomalies and lumbar erosions. Intrathecal contrast enhanced CT scanning is the diagnostic procedure of choice. Nevertheless, this method usually is descarted as is invasive and has the disadvantage of ionizing radiation. MRI is preferred as is a safe, rapid, and noninvasive.\cite{3418399} Abdominal ultrasound could reveal the presence of the intra-abdominal cystic abnormality, careful examination should be made to avoid misdiagnosis with cysts in other locations, a typical example of this is the confusion with ovarian cysts, as happened with our patient, and has been described in other reports.\cite{16673368}\cite{23486628} In our patient an invasive technique was executed with the consequent increased risk of producing a CSF leak into the abdominal cavity, although sometimes the fistula can occur by itself.\cite{21882098}\cite{18447698}\cite{20871432}  Surgical options consist primarily of eithera posterior transsacral or  an anterior transabdominal or a posterior transsacral  approaches. Several reports have stressed the advantages of the posterior transsacral technique, which offers (citas), anterior transabdominal approach \cite{16793455}