urothelial definitionurothelial neoplasm definitionurothelial cancer definitiontransitional cell carcinoma definitionmetastatic urothelial carcinomametastatic urothelial cell carcinomaurothelial malignancybronchogenic carcinoma definitionesophageal carcinoma treatmentpapillary carcinomaperitoneal carcinomabladder carcinoma treatment