Choosing the type of diagnosis depends on each patient and symptoms, but it is usually physical examinations, blood tests, imaging tests, and biopsies. The biopsy is a safe method of detecting colon cancer. Assumes sampling a tissue sample to be tested in the laboratory.

In addition to physical examination, the following diagnostic tests and procedures may be recommended: 

Colonoscopy

Allows visualization within the rectum and colon;

Biopsy

Removal of a tissue sample for examination under a microscope to detect the presence of cancer and complete the diagnosis of cancer;

Molecular tumor testing

In order to identify specific genes, proteins, and other unique tumor factors;

Blood tests

The count of red blood cells, part of the complete blood count, may indicate possible bleeding in the intestine caused by colorectal cancer;

CT scans

Obtaining three-dimensional images inside the organisms, can be used to estimate the size of the tumor;

MRI scans

To measure the size of the tumor; a contrast substance is administered before scanning to obtain clear images;

Echography

Endorectal ultrasonography is a technique used to detect deep rectal cancers and to establish a treatment plan.