NCCN Guidelines for Patients® | Colon Cancer - page 15

NCCN Guidelines for Patients
®
Colon Cancer, Version 1.2014
13
2
Cancer staging
TNM Scores
Figure 2.1
Polypectomy
Polyps may be removed
with a snare and then
sent to a pathologist for
review.
Figure 2.2
Primary tumor growth
In the far left column,
a tumor is shown in
the mucosal layer of
the colon wall. In the
columns to the right, the
tumor is shown to be
growing though the colon
wall and has spread into
the lymph nodes.
TNM scores
The AJCC (
A
merican
J
oint
C
ommittee on
C
ancer)
staging system is used to stage colon cancer. In this
system, the letters T, N, and M describe a different
area of cancer growth. Using test results, including
the pathologic review, your doctors will assign a
score to each letter. These scores will be combined to
assign the cancer a stage.
T = Tumor
The T score tells into which tissues the primary tumor
has grown. The primary tumor first grows through
the layers of the colon wall as shown in
Figure 2.2
.
Outside of the wall, it will then grow into nearby
organs and structures.
Illustration Copyright © 2014 Nucleus Medical Media, All rights reserved.
Illustration Copyright © 2014 Nucleus Medical Media, All rights reserved.
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