Evaluation Fields of CS
The CS method of evaluation data items are the CS Tumor/Extension Evaluation code for tumor (T); the CS Lymph Node Evaluation code for lymph nodes (N), and the CS Mets Eval code for the distant metastasis at diagnosis (M). Each is a one-character code with coding instructions described in the Collaborative Staging Manual.
This field is used primarily to describe whether the staging basis for the T, N, and M in the TNM system is clinical or pathological.
The evaluation fields also identify cases with pre-operative treatment and explain why and when clinical information was used in place of pathologic information. The evaluation fields allow for mixed staging; for example, pT3 cN0 cM0 cTX pN1 cM0.
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