Site‐Specific Recommendations for pT and pN

This chapter is an expansion to the following general rules of the TNM system (TNM Classification 1992, pp. 5, 6): 2 b. Pathological assessment of the primary tumour (pT) entails a resection of the primary tumour or biopsy adequate to evaluate the highest pT category. The pathological assessment of the regional lymph nodes (pN) entails removal of nodes adequate to validate the absence of regional lymph node metastasis (pNO) and sufficient to evaluate the highest pN category. 4. If there is doubt concerning the correct T, N or M category to which a particular case should be allotted, then the lower (i. e. less advanced) category should be chosen. In the TNM Classification (1992) these general rules have been specified for breast cancer only. Analogous definitions for the other tumour sites are given below.