Background: Neuroblastic tumors are the most common extra-cranial solid tumors in childhood. They arise from the neural crest cells. The most common sites of presentation are the posterior mediastinum, retroperitoneum, head and neck region. GN are usually asymptomatic and are found incidentally on abdominal imaging. The treatment is complete surgical excision. Case Report: A 3 year old boy presented to the surgical OPD with pain abdomen. There was a palpable lump present in the left hypochondrium& umbilical region. CT images revealed a soft tissue mass lesion in the left para-spinal region of the retroperitoneum abutting the abdominal aorta, vertebral column, psoas muscle and left kidney. A pre surgical biopsy revealed a benign ganglioneuroma. Total resection of a 6 X 5 X 6 cm sized tumor was obtained via exploratory laparotomy. Histopathological analysis confirmed the diagnosis. Conclusion: Ganglioneuroma (GN) is a rare benign tumor, usually asymptomatic. One of the most common site of presentation is retroperitoneum, the main treatment is complete surgical excision.