VIP and Hypokalemia: F: female; GN: ganglioneuroma; GNB: ganglioneuroblastomas; HypoCa: hypocalcemia; HypoC: hypochloremia; HypoK: hypokalemia; HypoNa: hyponatremia; HypoP: hypophosphatemia; M: male; N: no; N/A: not available in the article; NB: neuroblastoma; O: octreotide; PR: partial resection; QT: chemotherapy; RT: radiotherapy; RTot: total resection; ULN: upper limit normal; VIP: vasoactive intestinal peptide; Som: somatostatin; Y: yes