Joan Rivers' doctors are expected to do an assessment of any damage to her brain after removing her from a medically induced coma.

The New York Daily News reports that the 81-year-old comedian remained on life support Monday and is in serious condition at New York's Mount Sinai Hospital. A source for the family tells the Daily News that doctors should be able to get a reading on her brain function Tuesday.

Rivers was hospitalized Thursday after going into cardiac and respiratory arrest during a routine procedure on her vocal cords at a private clinic.

Meanwhile, taping of her E! show "Fashion Police", which was to take place in New York in conjunction with Fashion Week, has been canceled.

Rivers' daughter, Melissa, and close friends of her mother are keeping watch over the comic legend at her bedside. "We are keeping our fingers crossed," said Melissa.