A father whose teenage daughter died of tuberculosis, despite seeing a GP 23 times and seeking help at four hospitals, has told how her condition got so bad doctors thought she had cancer.
Alina Sarag's TB went undiagnosed for almost five months.
She passed away at Birmingham Children's Hospital in January 2011 after suffering a cardiac arrest.
An inquest into Alina's death has now recorded a verdict of death by natural causes.
Coroner Aidan Cotter said: "A diagnosis should have been made and treatment should have been started. I am satisfied that the failure to take action did have a direct causal connection to Alina's death."
Her father Sultan said: "They thought she'd got cancer in her body because it spread so much it was like her organs, her kidneys shut down, her lung exploded and that's when they gave her a quadruple dose of medicine for TB. That's what I was told then, but it was too late then."
The inquest heard that 15-year-old Alina had already tested positive for TB following an outbreak at her school in 2009.
After receiving antibiotics the disease was found to be "latent".
But when she returned from holiday in Pakistan in August 2010, she fell ill.
She was diagnosed with diarrhoea but her condition continued to deteriorate.
Mr Sarag told the inquest that over the following months, he called his local GP surgery "more than 50 times" for help, and that as well as Heartlands Hospital, Alina was either referred to, or he took her to, Birmingham's City Hospital, Birmingham Children's Hospital or Sandwell Hospital in the Black Country.
He said he made various doctors aware of her previous positive TB test.
"We were just failed every step of the way. No one really took much interest to be honest with you, that's the way I see it," Mr Sarag told Sky News.
"She wasn't able to eat anything, she was unable to walk unassisted, she couldn't climb upstairs, she got to the stage she was collapsing on her knees."
Mr Sarag said Alina was vomiting up to 10 times a day, lost weight and at times could tolerate only baby food.
On different occasions, healthcare professionals thought the schoolgirl might have a chest infection, viral infection, meningitis and bulimia.
But her father said she was left "heartbroken" when a GP suggested she might be "lovesick" over a boy, and that her illness could be "in her head" and she should see a psychiatrist or spiritual healer.
Dr Sharad Pandit, who runs Highgate Medical Centre in Birmingham, and had been Alina's GP since birth, told her inquest that he "fully accepts" that a diagnosis of TB "never crossed his mind".
He said Alina's symptoms did not suggest that she was suffering from TB, and while he had wondered whether she had a "psychological problem", as well as exploring other options, he never mentioned it in front of her or suggested she should see a "spiritual healer".
The inquest at Birmingham Coroner's Court also heard that an NHS review into Alina's care identified several missed opportunities to diagnose her TB.
But the inquiry by the Heart of Birmingham Primary Care Trust, found that no individuals involved in her case had made major mistakes.
It concluded that there was a need for greater awareness of the disease and its dangers across the medical profession.
The court was told that in 2011, there were 402 cases of TB in Birmingham.
Outside the court, Alina's family confirmed they will be taking legal action and referring the GP to the General Medical Council.
Solicitor Thomas Riis Bristow said: "The family are devastated by the loss and deeply saddened to learn that her death could have been avoided and that medical care could have treated her TB it is sadly too late for Alina and her family will have to live for the rest of their lives with the memory of what has happened. They only hope that lessons are learned in the wake of Alina's death."
The coroner said he hopes Alina's case will highlight to doctors and the public that TB can re-activate and he warned the disease had once again "become a serious threat to life in the UK".