American physician Dr Prudden pioneered the use of bovine tracheal cartilage as a treatment for cancer. His full text paper on the treatment of people with advanced cancer with bovine tracheal cartilage (either as a stand alone therapy or adjunct to other treatments) will be able to downloaded from this link in a few days; please check back if this is a subject that interests you.
In the meantime, you may like to read the abstract: http://www.ncbi.nlm.nih.gov/pubmed/4087031
Click here to download the document.