[Retroperitoneal ganglioneuroma as a cause of obstructed labor]

The case of a primigravida is reported who was operated on for a retroperitoneal ganglioneuroma at the age of 12. At that time the tumor surgically could not be completely removed because of its size and anatomical location in relation to the backbone and the large blood vessels. A renewed tumour growth was observed in the course of the years. At the end of pregnancy the tumour proved to be an obstruction to the labour process.