Their investigations on cancers found in the lower animals, and the successful transplantation of such growths into a new host of the same species (mice and rats), have greatly advanced our knowledge of the etiology of this disease.
The irritant may be chemical, as is seen in the skin cancers that develop in workers in paraffin, petroleum, arsenic and aniline.
Others may have a broader, more general affect, perhaps causing cell growth to become abnormal, leading to cancers.
It contains the cancer antigen carcinoembryonic antigen, which is present on most colorectal cancers.
Not all large bowel blockages are due to cancers originating in the bowel.
