The United States increased by kidney cancer

In the past 20 years, abdominal ultrasound and CT scan of the increase in the United States the increased incidence of renal cell carcinoma play a role. The University of Nebraska, Dr. Lynette M. Hock pointed out that the study found that at least some cases by scanning is \ benign, limitations \ the kidney, these patients with renal cell carcinoma will not threaten life. Ultrasonography and CT scan in the 1980s, the introduction of abdominal imaging, with the attendant increase in the number of renal neoplasms. In the 1980s, before the majority of patients in pain before diagnosis, the pain of the disease often occurs in later. Believe that the diagnosis of renal tumors has also led to earlier diagnosis of cancer. The researchers selected in 1973 to 1998, more than 43,000 patients were studied and compared the incidence of cancer each year. The results showed that 45% diagnosed as localized tumors, approximately 23% diagnosed with a regional tumor, while 32% diagnosed as metastatic tumors. 1986 to 1998, the limitations of the ratio of kidney cancer rose slightly, up to 54%, while the ratio of metastatic renal cell carcinoma declined to 25%. While the diagnosis of the patients had increased, but in the 1970s and 1990s, the period between the diagnosis of no statistical difference. The researchers found that the overall incidence of renal cell carcinoma from 1973 to 6.2 cases / 100,000 up to 1998 to 9.6 cases / 100,000