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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 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.
• T The a prefix designates the stage determined at autopsy: aTNM

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