NCCN Guidelines for Patients® | Colon Cancer - page 71

71
NCCN Guidelines for Patients™: Colon Cancer
Version 1.2012
Part 8: Dictionary
Intensity-modulated radiotherapy
(IMRT)
Radiotherapy that uses small beams
of different intensities.
Internal radiotherapy
Radiation therapy received from a
radioactive object placed near or in
the tumor.
Intraoperative radiotherapy (IORT)
Radiotherapy given during surgery.
Invasive colon cancer
Cancer cells that have spread through
the submucosa of the colon wall.
KRAS
gene
Instructions in a cell for making
K-Ras protein.
Lamina propria
Connective tissue within the mucosa
of the colon wall.
Laparoscope
A thin, long tube with a light and
camera used to see the abdomen.
Laparoscopic surgery
Surgery with a thin tool inserted
through a small cut into the body.
Large intestine
The digestive organ that prepares
unused food for leaving the body.
Laxatives
Drugs used to clean out the intestines.
Localized perforation
Holes in the colon from the tumor.
Lymph
A clear fluid containing white
blood cells.
Lymph nodes
Small groups of special immune cells
located throughout the body.
Lymph vessel
Tube-shaped ducts that carry lymph
throughout the body.
Lymphatic
Relating to the system made up of
lymph, lymph nodes, and lymph
vessels.
Lymphectomy
Surgery to remove lymph nodes.
Lymphedema
Swelling due to buildup of lymph.
Lymphovascular invasion
Spread of cancer into lymph or
blood vessels.
Lynch syndrome
An inherited medical condition that
increases the odds of colon cancer.
Magnetic resonance imaging (MRI)
A test that uses radio waves and
powerful magnets to view the parts of
the body and how they are working.
Margin status
The presence or absence of cancer
cells in the normal-looking tissue near
the tumor.
Marrow
Soft tissue found in the center
of bones.
Medical oncologist
A doctor who specializes in all types
of cancer.
Mesentery
A double layer of peritoneum attached
to digestive organs.
Metachronous metastases
Metastases that occur after colon
cancer treatment.
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