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.
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.