A girl died after being struck down by a mystery illness that baffled a team of 30 doctors, an inquest has heard.
Christina Faber, 13, had been fit and healthy until she was admitted to hospital with breathing problems.
Medical experts at the Royal Brompton and Royal Marsden hospitals found thrombosis, plus a tumour near her liver. Despite a successful operation and ongoing treatment, her condition deteriorated and 11 days later she died from blood clots all over her body including a fatal one in her brain.
The doctors were unable to reach a diagnosis after her death in July.
Her mother, Susan Cox, said after the inquest: "They did what they could and there was nothing more they could have done. But I would have liked to find out what caused it."
Recording a verdict of death by natural causes, Westminster coroner Paul Knapman said: "This is very rare. She was an ordinary young person who had no particular medical history. Even after her death with 30 people in the room we still did not have a diagnosis."
Cox, of Shepherd's Bush, said her daughter wanted a career in fashion. "She was always smiling and positive throughout," she said.
Dr Piers Daubeney, a consultant cardiologist at the Royal Brompton, told the inquest: "The conclusion was that this was a disease of clotting. We do not have a name for it." ( Gulf )