I just read an interesting announcement from the FDA regarding the drugs like procrit. It states that with certain doses, they have seen more rapid growth of head and neck tumors. It also has a few other risks noted for other conditions.

Here's the link for those who are interested.

http://www.fda.gov/bbs/topics/NEWS/2007/NEW01582.html

SCC Right Lateral Tongue T2N0M0 Dx 01/12/06, Surgery 01/25/06. Partial Glossectomy, Bilateral Neck Dissection - 22 lymph nodes - all clear. No radiation.