The girl drank five liters of water a day and had no idea about the terrible disease (4 photos)

In June 2023, Alyssa Bowman began to suffer from constant thirst. The 17-year-old from Yorkshire, UK, drank five litres of water every day. Her GP suggested that it might be due to diabetes, but he was wrong.





That same year, Alyssa lost her appetite and was unable to get out of bed while on holiday in Thailand.

On December 22, an MRI scan revealed that the girl had a brain tumour. She began having chemotherapy every three weeks at Leeds Hospital and by November 2024 the tumour had shrunk by 90%.



Alyssa's mum Fran said: 'I was really worried about her constant thirst. At first I thought it might be type 2 diabetes but doctors ruled that out. It was a shock when the doctor told us it was a brain tumour.'

An MRI scan showed Alyssa had a tumour in the middle of her brain which was affecting her pituitary gland, causing her to have diabetes insipidus - a rare condition that causes her to produce large amounts of urine and become thirsty.





The 49-year-old said: “It’s been the toughest two years of our lives, but Alyssa is a tough cookie. She’s the bravest, most inspiring person I know. I admire her courage.”

“That’s why I decided to run the London Marathon. She’s been through so much, and now it’s my turn to challenge myself. I’m proud to be running in aid of Brain Tumour Research.”



Bowman's case is being examined by a national medical commission that must determine the exact type of tumor.