The family of Jeannine Harvey, who died of cancer in July after medical staff failed to diagnose the condition on more than 30 occasions, have released video footage they filmed of the agony she suffered.
Jeannine and her family are seen begging for anaesthetic to numb the pain caused by uterine cancer of the cervix.
Viewers may find the footage distressing.
During her ordeal, Ms Harvey was at various times told she did not have cancer, informed that her agonising pain was caused by a back problem, and diagnosed with a torn ligament.
Lawyers acting for the family of Jeannine - who was suffering from uterine cancer of the cervix - believe the death has national implications for the diagnosis and timely treatment of cancer.
– Jill Davies, a medical negligence lawyer with national law firm Access Legal from Shoosmiths.
This is one of the most tragic and distressing cases I have ever seen. Even if Jeannine's life could not have been saved, with an earlier correct diagnosis she could have avoided months of intractable pain.
– Marie Donovan, Jeannine Harvey's sister
We want an explanation as to how this happened and an assurance that no one else will have to endure what my sister had to go through.
"No one listened to us and the doctors constantly patronised us by saying it was her anxiety that was making Jeannine's pain worse."
The family of a mother of four from Rowley Regis are demanding answers from the NHS over why her condition remained undiagnosed despite more than 30 hospital visits.
Relatives of Jeannine Harvey said the 33-year-old died in agony after repeated failures by medical staff to recognise, diagnose and treat her condition.
Ms Harvey, from Rowley Regis, died in July, eight months after first complaining of pain in her left leg and abdomen.