The news was released on Thursday evening.
Roughly 800 women who underwent the CervicalCheck screening were not issued with their results due to what the HSE have said was an "IT issue".
The HSE said it sincerely apologised for the issue, and the confusion, stress and considerable anxiety it may have caused for some women.
The tests in question were mostly carried out between 1 October 2018 and 25 June of this year.
The results were mainly for repeat tests for human papillomavirus (HPV).
According to
RTÉ, the HSE have also said that a small number of tests affected by the issue have also been identified outside of the aforementioned time period.
The reason given for the confusion is that an IT update was supposedly taking place at the laboratory, and "results are now being issued manually to GPs until that is completed".
"The existence of an IT issue was identified following engagement with the Department of Health in relation to representations from a woman using our services," the HSE said.
They have also said that its priority is to ensure that the women involved are kept informed and receive their results promptly.
