By Rebecca Lewis @RebeccaSLewis
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The enormous mass caused Nunwati Devi, 30, from Bihar in India, so much pain that she contemplated suicide.
The huge growth is believed to have been caused by growing teratoma syndrome (GTS) - a rare condition in which chemotherapy wipes out the malignant elements of a tumour, leaving the benign tissue to multiple exponentially.
Devi underwent an ovarian cystectomy in her right ovary and three cycles of chemotherapy in early 2014 - but her tumour continued to grow.
A CT scan and exploratory laparotomy found a huge abdomino pelvic mass - meaning the only option was to remove it in a gruelling eight-hour operation.
And now Nunwati is “the happiest person on earth”, according to her husband Umesh.
Nunwati was referred to Medical Oncology at the All India Institute of Medical Sciences (AIIM) in December 2014 after her tumour showed no signs of abating.
The tumour was so large that her uterus and urinary bladder could not be seen on the scan as they were obstructed by the tumour.
On February 26 2015 the doctors removed the tumour - but at a large cost to Nunwati.
A major part of the urinary bladder and portion of the large bowel was removed, and a reconstruction was made out of the small intestine.
Before Nunwati was wheeled into the operating theatre she weighed 60.5kg – but once the tumour was removed she weighed just 43kgs.
Nunwati’s husband said: “My wife just wanted to get rid of this thing.
"She told me ‘I don't want to die due to this. I will take poison, I will commit suicide at a railway track but I won't die because of this. It is fine if I die during the operation or after the operation but I just want to get rid of this tumour or whatever it is.’"
And with the successful operation behind her, Nunwati is today on the road to recovery.
Umesh said: “Today she is the happiest person on earth."
AIIMS doctors said they had never seen an ovarian tumour on this scale.
Doctor M.D Ray, from the hospital's Surgical Oncology department, said: "I have never seen a tumour of this size in my career.”