A case of mixed tumor formed by metastasis of urothelial carcinoma and malignant lymphoma to the same lymph nodes.

Introduction: Mixed tumor in the same lymph nodes is extremely rare and no previous reports have described mixed tumor comprising urothelial carcinoma and malignant lymphoma.

Case Presentation: A 71-year-old woman visited a local clinic with a main complaint of hematuria. Imaging revealed right hydronephrosis and a mid-ureter tumor shadow.