Leander Paes, who is being treated for a brain cyst in the United States, could be suffering from an infection common in India, the doctor attending to him said.

"While not yet proven in Leander's situation, one rather common infection in India causing such a brain lesion is cysticercus granuloma caused by the larval form of a tapeworm," Dr. Clarence Brown, President Chairman of the MD Anderson Caner Centre, where Paes is being treated, said on Thursday.

Also Read Get well, Leander

Brown said results of numerous tests on Paes are still being awaited.

"He is no longer experiencing headaches and his vision is normal. He remains in excellent spirits and is physically active," Brown said.

Paes reportedly suffered severe headaches during his first round doubles match last week in Cincinnati, Ohio, and later checked himself into an emergency room near his Orlando base three days later.

He was moved to MD Anderson Cancer Centre after a scan revealed lesion in his brain's left occipital region.

He was to team up with former partner Mahesh Bhupathi at the $355,000 ATP Tour event in Long Island, New York, this week but the duo withdrew due to Leander's illness.

Also read:

- Paes's illness shocks Bhupathi

- Paes is stable: Orlando hospital chief

-  'Leander feeling much better'

- Paes hospitalised with brain lesion