Abstract
We report the case of a 15-year-old woman who was referred to a previous hospital with a chest CT showing an abnormal mass in the upper mediastinum. The tumor showed a low-level uptake of FDG-PET. We performed resection of the mediastinal tumor, which was diagnosed as a Castleman's disease. Upper mediastinal Castleman's disease in childhood is a very rare disease, and several cases have been reported in Japan.
