What does TNM staging mean on a pathology or staging report?
TNM is the most common staging system. T describes the tumor's size or reach, N whether nearby lymph nodes are involved, and M whether it has spread to distant places. These letters combine into an overall stage.
Also written as
- TNM
- TNM system
Please read: This page explains general report language and cannot interpret your personal report, diagnose a condition, judge how serious a result is, or recommend treatment. Only your care team can do that.
How to read stage & grade results
Stage and grade are shorthand for how much cancer there is and how its cells look, built from several inputs — tumor size, lymph nodes, whether there is distant spread, and how abnormal the cells appear. Letters and numbers like T2, N0, or grade 3 are grouped into an overall stage, but the same stage can behave differently from person to person, and staging can change once surgery gives more information. These categories guide treatment and set expectations, yet they are one part of a fuller picture. Your team explains what your specific stage and grade mean for the options ahead.
Questions to ask your care team
- What is my overall stage and grade, and how were they decided?
- Could the stage change after surgery or more testing?
- How does this stage guide my treatment options?
- What does this mean for what to expect going forward?
Related stage & grade terms
- Lymph node statusLymph node status describes whether cancer was found in the lymph nodes that were checked, and how many.
- Extranodal extensionExtranodal extension means cancer in a lymph node has grown through the node's outer wall into nearby tissue.
- StageStage describes how much cancer there is and how far it has spread, usually from 0 to 4.
- GradeGrade describes how abnormal the cancer cells look under the microscope, often from 1 to 3.
- T category (Tumor)The T in staging describes the main tumor — usually its size or how far it has grown into nearby tissue.
- N category (Nodes)The N in staging describes whether cancer is in nearby lymph nodes and how many.
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