<qa>  What type of cancer is the most commonly diagnosed type?Approximately 30,000 new cases of kidney cancer will be diagnosed in the U.S. in 2002, with renal cell carcinoma RCC being the most commonly diagnosed type. For patients with locally advanced or metastatic disease, the treatment options are extremely limited and additional options are warranted. Although RCC is generally considered resistant to chemotherapy, spontaneous regressions in patients with metastatic disease have led to research involving immune-mediated therapeutic approaches. Clinical responses have been observed and additional immune-modulating therapeutics are being studied. 