JUST IN: Supreme Court Justice Ruth Bader Ginsburg 'resting comfortably' after surgery on two malignant nodules in her left lung – court spokeswoman pic.twitter.com/z193yvbM1P

— Reuters Politics (@ReutersPolitics) December 21, 2018

They found it early because of her fall.

#RGB#BREAKING: Justice Ruth Bader Ginsburg underwent surgery today for early stage lung cancer, according to the Supreme Court public information officer.
• The 85-year-old is at Memorial Sloan Kettering in New York.
• NO traces of disease found after surgery@WUSA9 pic.twitter.com/6PM2z2qzQs

— Mike Valerio (@MikevWUSA) December 21, 2018