Urothelial Cancer Metastasized into Mediastinal Benign Neurilemmoma: A Case Report

We report a 79-year-old male patient with urothelial cancer who underwent total cystectomy with ureterostomy 10 years earlier and right nephroureterectomy 3 years and 9 months earlier. The patient had chest complaint with posterior mediastinal tumor for 7 years and its slow growth rate suggested that the mediastinal tumor was benign but metastatic materials could not be ruled out because cytology of pleural effusion demonstrated atypical cells. He died from the progression of urothelial cancer and autopsy demonstrated that metastatic urothelial cancer was involved in the mediastinal benign neurilemmoma.