President-elect Joe Biden will probably have to wear a walking boot for several weeks while he recovers from breaking his right foot while playing with one of his dogs, his doctor said.
Mr Biden suffered the injury on Saturday and visited an orthopaedic surgeon in Newark, Delaware, on Sunday afternoon.
"Initial X-rays did not show any obvious fracture," but medical staff ordered a more detailed CT scan, Dr Kevin O'Connor said in a statement.
The subsequent scan found tiny fractures of two small bones in the middle of his right foot.
"It is anticipated that he will likely require a walking boot for several weeks," Dr O'Connor said.
Fractures are a concern generally as people age, but Mr Biden's appears to be a relatively mild one based on his doctor's statement and the planned treatment.
At 78, Mr Biden will become the oldest president when he is inaugurated next month.
He often dismissed questions about his age during the campaign.
Reporters covering the president-elect were unable to see Mr Biden enter the doctor's office on Sunday, despite multiple requests.
Leaving later to head to an imaging centre for his CT scan, he was visibly limping, although he was able to walk without a crutch or other aid.
Mr Biden sustained the injury playing with Major, one of the Bidens' two dogs.
They adopted Major in 2018 and acquired their first dog, Champ, after the 2008 election.
The Bidens have said they will be taking their dogs to the White House and also plan to get a cat.
Last December, Mr Biden released a doctor's report showing he takes a statin to keep his cholesterol at healthy levels.
His doctor described him as "healthy, vigorous" and "fit to execute his duties".