WASHINGTON: US Secretary of Defence Lloyd Austin apologised on Thursday for concealing his prostate cancer diagnosis and hospitalisation from President Joe Biden, the rest of the government, and the American public.

Still in recovery, Austin continues to suffer from leg pain and said he used a golf cart for transportation inside the Pentagon ahead of the rare solo press conference.

The defense secretary has come under heavy political fire from Republicans over his undisclosed absence at a time when the United States faces a spiraling crisis in the Middle East.

Austin said he has not considered resigning and that Biden continues to back him. However, he repeatedly apologized, blaming his naturally `private` instincts following the shock of the diagnosis.

`I should have told the president about my cancer diagnosis,` he told journalists. `I have apologised directly to President Biden.

The 70-year-old Austin was out of the public eye for weeks, beginning with minor surgery to treat prostate cancer on Dec 22 that saw him hospitalised until the following day.

He was readmitted due to complications including nausea and severe pain on Jan 1, but the White House was not informed until Jan 4, while Congress was not told until the following day, and Biden did not learn of the cancer diagnosis untilJan 9.

`Gut punch` Austin said that he did not direct his `staff to conceal my hospitalization from anyone,` but acknowledged: `We did not get this right.` The controversy over his health problems comes with American forces in Iraq and Syria facing near-daily attacks one of which killed three soldiers over the weekend while Yemen`s Houthis have repeatedly targeted international shipping.

The top US defense official is also a key figure in attempts by the Biden administration to maintain support for Ukraine`s fight against Russian invasion, with Republican members of Congress refusing to authorise new funding for military aid to Kyiv.

Austin -a commanding presence at well over six feet tall -is an intensely private person who eschews the spotlight, which he said played into his decision to keep the cancer diagnosis secret.

It `was a gut punch. And frankly, my first instinct was to keep it private.

`I don`t think it`s news that I`m a pretty private guy I never liked burdening others with my problems, Austin said.-AFP