NCCN Guidelines for Patients® | Esophageal Cancer - page 17

17
NCCN Guidelines for Patients
®
: Esophageal Cancer
Version 1.2013
Part 2: Cancer staging
Par t 1
Par t 2
Par t 3
Par t 4
Par t 5
Par t 6
Par t 7
Par t 8
Par t 9
Definitions:
Clinical staging:
Rating
the extent of a tumor based
on tests before treatment
diaphragm:
A sheet of
muscles below the ribs that
helps a person to breathe
pericardium:
The two
layers of tissue lining
around the heart
pleura:
The two layers
of tissue lining around
the lungs
trachea:
The airway
between the throat and
main airways into the
lungs; also called the
windpipe
!
Read page 8 for
information on the
esophageal wall.
N = Nodes
The N category reflects how far the cancer has spread within nearby lymph nodes.
N0
means there is no cancer in nearby lymph nodes.
N1
means the cancer has spread to 1 or 2 lymph nodes.
N2
means the cancer has spread to 3 to 6 lymph nodes.
N3
means the cancer has spread to 7 or more lymph nodes.
M = Metastasis
The M category tells you if there are metastases to sites not in direct contact
with the esophagus. Such sites include distant lymph nodes.
M0
means the cancer hasn’t spread to distant sites.
M1
means the cancer has spread to distant sites.
Figure 5. Areas of tumor growth
Illustration Copyright © 2013 Nucleus Medical Media, All rights reserved.
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