The Pentagon has launched a review of U.S. Defense Secretary Lloyd Austin’s hospitalisation.

The review comes after the White House said President Joe Biden did not know of his Defense Secretary’s prostate cancer until this week.

Austin remains hospitalised and is in good condition while review continues.

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The Pentagon stated that it does not have a specific date for his release while Austin recovers.

The Pentagon disclosed on Tuesday that U.S. Defense Secretary Lloyd Austin had surgery to treat prostate cancer in December but then developed complications that brought him back to the hospital, where he has remained since Jan. 1.

Here’s what has been revealed publicly about Austin’s condition and his course of treatment and what experts say about the illnesses affecting him.

What is Lloyd Austin being treated for?

Austin, who is 70, learned he had prostate cancer in December after routine surveillance for the illness via blood tests to monitor levels of prostate-specific antigen (PSA).

Austin was admitted to Walter Reed National Military Medical Center and underwent prostatectomy, which experts say could involve the complete or partial removal of the prostate and nearby lymph nodes.

Austin was under general anesthesia during the procedure and Walter Reed, in a statement, said he recovered uneventfully from his surgery and returned home on the morning of Dec. 23.