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Prostate Cancer Treatment (PDQ®)

  • Updated: 04/11/2014

Table 1. Definitions of TNM Stage I

Stage TNM Description 
IT1a, N0, M0, G1T1a = Tumor incidental histologic finding in ≤5% of tissue resected.
N0 = No regional lymph node metastasis.
M0 = No distant metastasis.a
G1 = Well differentiated (slight anaplasia) (Gleason score of 2–4).

T = Primary tumor; N = Regional lymph nodes; M = Distant metastasis; G = Histopathologic grade.
Reprinted with permission from AJCC: Prostate. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 457-68.
The explanation for superscript a is at the end of Table 4.