He missed the tour of West Indies last year but featured against England at Trent Bridge before flying home with a broken finger.
He played in the two Tests of their home series against West Indies in November before being dropped for the third Test.
Chaudhary added: "Doctors had to decide whether to continue medication or go for chemotherapy. Since parts of the tumour are just above the artery of his heart, there was a danger it could burst if he did any running. But it is 100% curable.
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"The doctors decided that he will have to undergo chemotherapy and he travelled to the US on 26 January. At the end of March, he will undergo a CT scan and should have recovered by then.
"After that it is just some rehabilitation in April before he is fit to be back on the field in May.
"Thankfully no surgery is required, he is already a lot better than what he was and can't wait to be back on the cricket field."
Chaudhary also said the delay in treatment was due to a wrong diagnosis by a hospital last year.
"His first biopsy report was stolen from his car and the second from a hospital. I don't want to name [anyone involved] but they did not give the correct diagnosis," he said.
"It was a Russian doctor who detected the cancer and, after consultations with doctors in the US, it was decided Yuvraj would undergo chemotherapy."
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