Stewart and Treves, proposed that a cancer causing agent is present in lymphedematous limbs.

Unfortunately, nickel is a potential cancer producing agent.

Tangeritin also shows enormous potential as an anti cancer agent.

Marijuana smoke was listed as a cancer agent in California in 2009.

Since the late 1970s, scientists have hunted down potential human cancer agents, known as carcinogens, by feeding very high doses of suspect chemicals to mice and rats.

Thiotepa should only be administered under the supervision of a qualified healthcare provider experienced in the use of cancer chemotherapeutic agents.

Now also available in an IV form for people who can not swallow capsules or who have insurance that does not cover oral cancer agents.

The agency said it would make the distribution or use of the chemical, a suspected cancer agent, illegal after Feb.

However, no germanium compound has yet demonstrated a pharmaceutical use, as either an antibacterial or cancer chemotherapeutic agent.

The credit may go to nutrients called isothiocyanates, especially one called sulforaphane, which the researchers call "a highly promising cancer chemopreventive agent."