Indian batsman Yuvraj Singh issued an upbeat health report on Thursday after undergoing chemotherapy for a malignant cancer tumour between his lungs.

The left-handed Yuvraj, named Man of the Tournament after the World Cup last year, was diagnosed with cancer soon after the event ended.

Thousands of well-wishers, including US cycling great Lance Armstrong, have sent messages of support to the player, who is known for his aggressive batting and disciplined spin bowling.

Yuvraj, who scored 362 runs and bagged 15 wickets in nine World Cup matches, has not played competitive cricket since taking part in two of the three home Tests against the West Indies in November.

"Got very good news... The tumor is almost way out of the system... Second cycle has started," the 30-year-old all-rounder revealed via Twitter from the United States, where he is receiving treatment.

He has scored 8051 runs in 274 one-dayers and 1775 in 37 Tests since making his international debut in 2000.