On Tuesday, both the stalwarts wished each other quick recovery on Twitter.
Yuvraj tweeted: "Out of suffering have emerged the strongest souls. The most massive characters are seamed with scars..."
Mr Bachchan replied: "@yuvsingh09 could not agree with you more ... hope you are doing well Yuvraj .. prayers for your speedy recovery."
Yuvi thanked him for his wishes and said: "and one of the biggest examples is you mr bachchan ! Thank you very much I'm better each day."
On February 14, Yuvraj gave a great piece of news to all his fans as a Valentine's Day gift. He tweeted that his tumour was almost out of his system.
"Got very good news from dr lawrence today! The tumor is almost way out of the system Aftr reading my todays scan !Second cycle has started."
Dr Einhorn, who is known to be the among the best cancer doctors in the world, had also treated legendary cyclist Lance Armstrong, who had suffered from testicular cancer in 1996.
Yuvraj, who has been in Boston since last month, is expected to be back on the field in the first week of May, according to his doctor. His second cycle of chemotherapy has started.
The 30-year-old, who went to US last month, has gone bald during the treatment, which will go on till the last week of March before the process of rehabilitation starts in April.
After being diagnosed with the illness, Yuvraj has not played competitive cricket since taking part in two of three home Tests against the West Indies in November.
He has so far scored 8,051 runs in 274 one-dayers and 1,775 runs in 37 Tests since making his international debut in 2000. He was named Player of the Tournament in the World Cup for scoring 362 runs and grabbing 15 wickets in nine matches.