After his mother Shabnam made the revelation in a formal statement on Saturday, Yuvraj tweeted that he would be returning sooner rather than later.
"Overwhelmed with ur love n support. I am absolutely fine, just need to get match fitness and training will be back soon," he tweeted.
Yuvraj has been troubled by health issues since the World Cup, which India won, and has played just one Test match in England after that.
"Reports and scans then showed us that Yuvraj was dealing with something really serious. A golf-ball size lump was found over his left lung and doctors advised us to go in for more detailed scans."