India's flamboyant all-rounder Yuvraj Singh's is a major doubt for the Twenty20 World Cup to be held in September since he is getting treated in the US for the non-malignant tumour in his lung.
As a result Yuvraj's much-anticipated return to cricket may be delayed further by as much as nine more months, according to reports in the Indian media.
The 29-year-old left-hander had hoped for an early return to the game after he was recuperating from treatment for a non-malignant tumour.
He is currently consulting oncologists in the US.
"His treatment has started from scratch and he is responding well to treatment," a source close to the cricketer told Times of India.
The tumour, apparently, is situated between the lungs and the heart and so operating it "will not be easy", the source suggested.
"The Indian doctors have told Yuvraj's family that the operation of this tumour won't be easy. If it can heal with medicine, nothing like it," the report added.
Yuvraj's recuperation will start once the tumour is removed.
Even the Indian cricket board, which is footing his bills, is not willing to rush his comeback.
"We want him to be fully fit and time is not an issue," said an unnamed official.
Yuvraj was diagnosed with lung cancer just a few weeks after India won the World Cup in April in which he was named man of the tournament.
"He was coughing and vomiting all through the tournament. But we thought it was just the stress, and his desire to excel on the biggest stage... so we ignored it," his mother Shabnam Singh was quoted as saying in Times of India earlier.