The death occurred overnight of county Galway woman Patricia Carrick.
Patricia, of Oranmore, had campaigned for women nationally through her High Court case over a smear test which was misread. The case and her family's activism exposed serious questions about cervical cancer screening in this country.
The HSE and a testing laboratory apologised in the High Court to the terminally ill mother of four, last month, over the negligent reading of a smear test.
The apology was read as Patricia Carrick and her husband Damien settled their High Court action in which it was claimed Mrs Carrick’s smear test was misdiagnosed or misreported.
The Taoiseach Micheal Martin in the Dail, last month, also apologised to the Carrick family over the trauma they had experienced.