Surgery for posterior mediastinal dumbbell tumors: A case report.

•A woman was diagnosis recurrent mediastinal dumbbell-shaped nerve sheath tumor.•However, pathological examination showed mixed hemangioma.•During the procedures, the intrathoracic component can be resected by biportal thoracoscopy in a prone position; however, removal of the intraspinal tumor was incomplete because of copious bleeding.•If the diagnosis of dumbbell tumor is not conclusive, an endoscopic biopsy should be performed before removing the tumor.