WASHINGTON (CNN) -- Former Sen. Fred Thompson spoke out Wednesday about living with lymphoma, telling a conservative blog, "my life expectancy should not be affected" by the disease.

The "Law and Order" star and potential GOP presidential candidate wrote on RedState.com's blog that he has had "no illness ... or even any symptoms" from the type of cancer, which is described in greater detail in the post by Georgetown University oncologist Bruce D. Cheson.

The Tennessee Republican also noted John and Elizabeth Edwards' "courageous battle" against cancer, a disease he termed "non-partisan."

This is Thompson's second post on RedState in a week. A post last weekend on the topic of Iran fueled speculation about a presidential bid from the former senator.

Today's disclosure indicates "his seriousness as a potential candidate," according to former Sen. Bill Frist -- a supporter of a Thompson bid. On his own blog, Frist today urged readers to "continue to post your statements encouraging Fred to run so that I can share them with him."