Martin Sheen compares Charlie's problems to cancer

(CBS) Martin Sheen is breaking his silence on son Charlie Sheen's tumultuous year.

The elder Sheen says his son is "doing well" after entering rehab following reported partying and a trip to the hospital for abdominal pain.

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"We pray for him," Sheen said of his son on U.K.'s Sky News. "If he had cancer, how would you treat him?"

He added, "This disease of addiction is a form of cancer. You have to have an equal measure of concern and love and lift him up."

"Two and a Half Men" is currently on hiatus while Charlie recovers.