In 2016, 750,000 bladder cancer survivors are estimated to live in the United States alone and over 75,000 new cases will be diagnosed.
1,2 The vast majority are urothelial tumors however a small proportion of these will be variant histologies. Sarcomatoid carcinoma (SaC) is such a subtype and is estimated to represent 0.3% of all urothelial cancers.
3 Much of our knowledge about this disease is derived from case studies or single-institution reports of which have totaled fewer than 100 cases in the last several decades.
4-7