PURPOSE: To report a rare case of ganglioneuroblastoma encountered rarely in adults, especially during pregnancy. Materials andMETHODS: The authors present a case of ganglioneuroblastoma relapse during the third trimester of pregnancy in a patient previously treated for ganglioneuroblastoma who had a eight-year disease-free interval. Late manifestation of neurological symptoms (vestibular syndrome, nystagmus, slightly right motor deficit) was perhaps influenced by the hormonal pregnancy effects. In this case the option was for caesarean section under general anesthesia at 36 weeks.RESULTS: Based on MRI result, the neurosurgical consultation stated the need of postpartum brain tumor excision. Recovery of the mother was complication-free with persistent, constant postoperative neurological symptoms. It resulted in a healthy newborn, not requiring special follow-up.CONCLUSIONS: Pregnancy and brain tumor have mutual negative effect on the patient. Therapeutic management in this case was a medical dilemma regarding mode setting and timing of delivery, taking into account the maternal-fetal risk-benefit.