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A decision was made not to include mapping strategies for all cancer types. Users should refer to the AJCC V7 manual and applicable staging form forms for further TNM staging codes used in other cancer types.

AJCC has defined prefix designators that may be used to indicate the different points in time when staging may be determined. For example, staging may be determined before any treatment (clinical stage) or after surgery (pathologic stage). As described in the AJCC V7, the prefix/suffix of "c", "p", "yc", "yp", "m", "r", or "a" may be applied. For example, the classification of T, N, and M by pathologic means is denoted by use of a the lower-case "p" prefix (pT, pN, pM). The "c" prefix is not generally used, but rather assumed, when just TNM is stated. A complete description of and definitions for these prefixes and suffixes are included in the AJCC V7.  

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• The "m" suffix indicates the presence of multiple primary tumors in a single site and is recorded in parentheses: pT(m)NM.
• The "y" prefix indicates those cases in which classification is performed during or following initial multimodality therapy. The cTNM or pTNM category is identified by a "y" prefix. The ycTNM or ypTNM categorizes the extent of tumor actually present at the time of that the examination. The "y" categorization is not an estimate of tumor prior to multimodality therapy.
• The "r" prefix indicates a recurrent tumor when staged after a disease-free interval, identified by the "r" prefix: rTNM.
• The "a" prefix designates the stage determined at autopsy: aTNM

Following The following is an example of the mapping strategy for the AJCC V7 as applied to lung cancer (RSSCAT = "LUNG CANCER"). The "m" suffix and "y", "r", and "a" prefixes could be attached to any of the results below.

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