Andretti tweet: Cancer returns again

John Andretti

Race driver John Andretti shared some sobering news Friday night.

His cancer has returned and he is going back on chemotherapy treatments.

In a tweet, Andretti said the treatments had no "definite end."

He went on to say, "All of the love & support means a lot."

During a routine check up back in January 2017, doctors told Andretti he had Stage 3 colon cancer.