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9

NCCN Guidelines for Patients

®

:

Rectal Cancer, Version 1.2017

1

Rectal cancer basics

The rectum

Figure 1

The digestive tract

The digestive tract consists

of 4 main parts. The

esophagus moves food

from your throat to your

stomach. In the stomach,

food is turned into a liquid.

Nutrients from the liquid are

absorbed into your body

within the small intestine.

The large intestine absorbs

liquid from and pushes

unused food out of the

body.

esophagus

stomach small intestine large intestine

Illustration Copyright © 2017 Nucleus Medical Media, All rights reserved.

www.nucleusinc.com

Figure 2

The rectum

The rectum is part of the

large intestine. The rectum

is almost 5 inches long.

It often contains three

folds. Its wall has four

main layers—the mucosa,

submucosa, muscularis

propria, and subserosa or

adventia. The wall is either

covered in serosa or fat.

mucosa

submucosa

muscularis

propria

subserosa/

adventia

Illustration Copyright © 2017 Nucleus Medical Media, All rights reserved.

www.nucleusinc.com

rectum

rectal wall