It reportedly took a team of experts seven hours to remove the mammoth tumour at the BYL Nair Charitable Hospital in Mumbai.
Santlal Pal, a 31-year-old shopkeeper, had been carrying around a tumour weighing almost 2 kg before the surgery on February 14.
"The tumor was so big that it appeared as if a second head was mounted on top of the patient's head", Srikanth Balasubramaniam, a senior surgeon who was part of the operating team, told DW news service.
Medics claim the biggest brain tumour that was successfully removed before this weighed just 3.1lbs (1.4kg). "The weight of a similar case reported earlier was 1.4 kgs", he said.
The hospital said the patient had made a good recovery and was now walking and eating normally.
The reportsaid that Pal, who is a shopkeeper from Uttar Pradesh, a norther Indian state, had the tumor for the past three years but it started to grow at a very fast pace last year. Nadkarni said that Pal was fortunate that only 10 percent of the tumor's body was inside the brain, lest the surgery would have been aborted from the start.
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He was reportedly told by three other hospitals that the tumor was inoperable. But as these images show they can also reveal some of the most gruesome and weird results.
Unfortunately, Pal's brain tumor left the man blind, but the doctors expect him to regain eyesight after the surgery.
The primary investigation revealed growth had spread to both sides of the brain through the skull bone.
Nadkarni said Pal received 11 units of blood during the operation and that, for three days following the procedure, he had to be on a ventilator to breathe.
Dr Nadkarni added: "Such large tumours are rare and are a surgical challenge. He feels relieved of "a large burden on his head", said Dr Ramesh Bharmal, dean, BYL Nair Hospital. But now it is gone: Doctors successfully removed the mass during an intensive, six-hour operation on Valentine's Day. "We could not spend a lot", his wife Manju said.