A 13-year-old girl who went to hospital with a headache died just hours later after she "had bleeding in her brain, lungs and stomach".
Julia Chavez, from Georgia, US, visited her local hospital complaining of a headache on Sunday evening when she collapsed and died just hours later at around 1am on Monday.
She was diagnosed with leukemia after blood tests and a CT scan showed she had cancer despite not her mentioning any symptoms.
Her heartbroken dad Dennis Chavez said in a statement: "My 13 year old baby girl was admitted to the hospital on Sunday.
"That's where we found out she had leukemia. It came on so hard and so fast. Doctors told us there was no way we could have known."
The teenager suffered some slight bruising but her parents put it down to her being a tomboy as she would normally shrug off any marks she found.
Dennis revealed: "When she would get a bruise, we would ask how she got it, and she would say, "I don't know," and shrug it off.
"We thought that it was because she's got a bit of tomboy in her."
The teen's devastated mum, Jenna Randall, described her daughter as "bubbly, bright' and beautiful", according to The Augusta Chronicle.
She said: "We never knew she had it. She never had more than a sniffle and she's never been hospitalised for anything since she was born."
Her brother admitted he's been left distraught by the loss as she was "his world." He told his mum: "I know she's my sister, but she's my world."
The brother and sister were inseparable and did everything together, according to their grandfather Ernie Randall.
He said: "'They were tied together at the hip. I remember a few years ago, I took Jackson to a car show and the whole time we were there, he couldn't have any fun because Julia wasn't with us.
"It's going take him a long time to get used to."
Ernie described his granddaughter as the "best little girl" he could have asked for.
"My granddaughter was the best little girl. God says that nobody is perfect, but I'd put a test to that one by her being perfect", he added.
Mum Jenna said her daughter loved learning about Japanese culture and aspired to be an artist.
She revealed: "'She wanted to learn everything she could about it. She was like an encyclopedia.
"We bought her a kimono because she always wanted one. She loved Japanese culture and wanted to visit one day."
