Ailing actress Zsa Zsa Gabor is being treated with powerful antibiotics as doctors try to save her right leg, which is infected with gangrene.
Her publicist John Blanchette said she had a deep lesion which could have entered the bone.
The treatment would last two to three days. If unsuccessful the leg would have to be amputated.
The 93-year-old has been admitted to hospital a number of times since breaking her hip in July.
In August she asked for a priest to read her the last rites following surgery to remove two blood clots.
A month later she was rushed to hospital after slipping into unconsciousness.
Mr Blanchette said Gabor had been bedridden in recent months.
But according to her husband, Prince Frederic von Anhalt, she had celebrated the Christmas holiday with champagne and caviar.
She was readmitted to hospital in the new year because a wound in her right leg had grown and "wasn't healing any more", he said.
Mr Blanchette said if the antibiotics did not work amputation was likely to be below the knee.
Gabor, who starred in films including Moulin Rouge and Touch of Evil, is partially paralysed following a car accident in 2002 and a stroke in 2005.