Rivers, 81, was listed in critical condition, according to CNN, and may have suffered cardiac arrest.
Her condition has since been upgraded to “stable,” the hospital said this afternoon.
Last year, the comedian, who is known for her barbed comments and tart tongue, revealed that doctors had discovered a suspicious spot in her throat.
The scene was captured on her and daughter Melissa’s reality show: “Joan & Melissa: Joan Knows Best?”
She had an x-ray after suffering from what she said was a persistent cough.
Our own lovely living legend Joan Rivers is in stable condition at Mt Sinai hospital ..#LiveFromE
— Ken Baker (@kenbakernow) August 28, 2014
The “Fashion Police” star was reportedly undergoing surgery on her vocal chords at the Yorkville Endoscopy clinic when when the incident occurred shortly before 10 AM, according to Extra TV.
For more details check out Celebrity Health & Fitness.