What is the significance of prostate cancer staging

Prostate cancer staging helps to understand the scope of diseases, prognosis and development of treatment programs. Prostate cancer very different process of development, the development of prostate cancer is not necessarily according to the first phase (A) to Phase IV (D) order. The first phase can be long-term cancer remaining in the period, can also be translated into Phase III (C) or Phase 4. Phase II (B), the third phase of cancer development is such a case. The development of prostate cancer as follows: 　　 A1 period: the elderly may be dealt with. Distant metastasis occurred opportunities for 8%, 2% in 5-10 years died of cancer. 　　 A2 period: 30% in distant metastases, 20% in 5-10 years died of cancer. 　　 B1 period: 30% in five years, the transfer occurred, 20 percent died of prostate cancer. 　　 B2 period: 80% in 5-10 years metastasis, 70% died of prostate cancer. 　　 C: 50 percent in five years distant metastasis, and 75% within 10 years died of cancer. 　　 D1 period: 85% in five years distant metastasis, the overwhelming majority in three years died of cancer. 　　 D2 period: 50% in three years died of prostate cancer, 80% in five years died of cancer, 90% in 10 years died of cancer. 　　 The prognosis of prostate cancer and the relationship between the phases are obvious. According to a group of post-operative follow-up results of patients, the 5-year survival rate A period was 78.9%; B for 86.1 percent; C was 66.7%; D view of 25%. 10 survival A period of 63.1 percent; B for 61.6 percent; C was 28.6%; D 0. 　　 Prostate cancer staging, literature statistics were A period accounted for 10% to 20%; B accounted for 25%; C accounted for 25 percent; D accounted for 30 percent. When the note was found more than half of the lesions is not limited, and often lower than the actual clinical stage of the disease.