[A case of giant dumbbell tumor treated by one-stage operation]

A 39-year-old woman who had been diagnosed as having von Recklinghausen's disease came to our hospital due to numbness of the right fingers. A chest roentgenogram indicated a mass in the right upper thoracic cavity and MRI showed this mass to be a dumbbell shaped tumor connected to the spinal canal. Because we could secured the extension and invasion of the tumor by MRI, we could remove the tumor by a one-stage operation.