The Department of Health has been urged to ensure funding is available for an oncology unit at Sligo University Hospital.
Construction of a 42-bed ward extension at the hospital started late last year.
The development includes a shell-and-core area, designed to support future development of a Cardiology CT unit and an expanded Day Oncology Services area.
Fianna Fáil TD for Sligo-Leitrim Eamon Scanlon says leaving the space idle would be a missed opportunity.
He says adequate funding must be in place: