What Is Stage 2 Colon Cancer?

At stage 2 colon cancer, the cancer is a little more advanced than stage 1 and has grown beyond the mucosa and submucosa. Stage 2 can further be classified into stage 2A, 2B or 2C.

Visual representation of colon cancer under a microscope

Read more on what is colon cancer here.

In stage 2 colon cancer, the diagnosis for the substages is done according to the following TNM categories:

Stage 2A

T3:

The cancer has grown into the outermost layers of the colon but has not grown through the layers and is known as T3.

N0:

The cancer has not spread to the nearby lymph nodes.

M0:

The cancer has not spread to distant organs or sites.

Stage 2B

T4a:

The cancer has grown through the outermost wall of the colon (serosa) but has not grown into the nearby tissues or organs.

N0:

The cancer has not spread to the nearby lymph nodes.

M0:

The cancer has not spread to distant organs or sites.

Stage 2C

T4b:

The cancer has grown through the wall of the colon and us attached to or has grown into the nearby tissues and organs.

N0:

The cancer has not spread to the nearby lymph nodes .

M0:

The cancer has not spread to distant organs or sites.

T1 or T2:

The cancer has grown through the mucosa and into the submucosa (T1). It may have also grown into the muscularis propria (T2).

N1 or N1c

The cancer has spread to 1 to 3 nearby lymph nodes (N1)
the cancer has not spread into the lymph nodes but there are deposits in subserosa, tissues adjacent to the colon (N1C).

M0:

It has not spread to distant sites.

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