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An inquest into the death of a young woman nearly 25 years ago is due to be held this week.

Siaron Lowis Bonds died at Ysbyty Gwynedd, Bangor, on September 9, 1994. She was suffering from cancer.

It is expected the hearing at Caernarfon will investigate dosages of drugs administered to her and why she had signed up for a clinical trial.

The inquest into her death was formally opened in 2016 but the full hearing was delayed. It will resume this week for the evidence to be considered and a verdict returned.

Speaking ahead of the inquest opening Ms Bonds' parents, John and Nerys, said: "Siaron was a loving and caring daughter, sister, fiancée, friend and a professional social worker. She is greatly missed every day.

"It is hoped that this inquest will provide us with long-awaited answers, and, ultimately, prevent any further such grief and suffering to other individuals and families."

(Image: Image courtesy of Ms Bonds' family)

Mrs Bonds is likely to be called to give evidence on behalf of herself and her husband and Ms Bonds' sisters Kerry and Glenda.

Details of the review of her care by Health Inspectorate Wales will be outlined and other witnesses whose evidence is likely to be read are Betsi Cadwaladr Health Board staff.

Ms Bonds, of Corlan y Rhos, Llanrug was admitted to Alaw Ward, the specialist cancer ward at Ysbyty Gwynedd, on September 7, 1994 for treatment and chemotherapy after being diagnosed with high grade non-Hodgkin’s adult lymphoblastic lymphoma.

She died two days later from acute tumour lysis syndrome (ATLS).

At a pre-inquest hearing held in 2017 North Wales assistant coroner Nicola Jones, who has since been appointed to be a Crown Court judge, said the inquest will investigate whether the level of care caused or contributed to her death.

Family barrister Chaynee Hodgetts said there were “issues of consent” and how Ms Bonds had become “part of a clinical trial.”

A review of 26-year-old Ms Bonds’ case by Health Inspectorate Wales between May and October 2006 found that the care given to Ms Bonds on Alaw Ward was “inadequate”.

It concluded that “a series of errors and omissions by Trust staff contributed directly to her death from a predictable and treatable consequence of chemotherapy”.

The inquest is scheduled to last four days.