Just 20% of breast cancer patients at Letterkenny University Hospital received their chemotherapy within the recommended timeframe in 2024.
According to the HSE, treatment must commence within eight weeks of surgery for 90 per cent of patients.
The Journal Investigates found all nine health centres missed their goals.
Donegal Sinn Fein TD Pearse Doherty believes the situation can be resolved, both in the short and the long term, if the will was there:
