Unclear question: Before metastases, colorectal cancer affects the mucosa and wall of large intestine. Tumors on the left side of the colon are more common than on the right side. See this site for more info. http://www.ncbi.nlm.nih.gov/pubmedhealth/pmh0001308/.
Answered 1/5/2014
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Invades thru: The bowel muscle, and affects regional lymph nodes.
Answered 3/12/2020
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