 [ Symptoms ] i had a breast cyst aspirated about 8 months ago it is back and both breasts are very sore  when it was aspirated the doctor said he never saw that mush fluid come out of a breast before it was bloody brown but came back normal now the cyst is back and very painful [ Disease ] the exact cause of colorectal cancer is not known most cases begin as small growths or polyps inside the intestine if colorectal cancer is not detected and removed it invades and destroys nearby tissues and may spread to other parts of the body webmd medical reference from healthwise this information is not intended to replace the advice of a doctor healthwise disclaims any liability for the decisions you make based on this information © 1995 2011 healthwise incorporated healthwise healthwise for every health decision and the healthwise logo are trademarks of healthwise incorporated