Primary Plasmacytoid/Signet-ring Cell Urothelial Carcinoma of Bladder: A Case Report

• ZHAI Linzhu, 
• ZHAO Yuanyuan, 
• LIN Lizhu LI Zeng, 
• LIAO Hong, 
• TAN Zheng, 
• MAO Dun, 
• WU Yi, 
• XIAO Yingming