Prior to these dates, cancer data related to the urgent and non-urgent pathways and was collected by Welsh Government through aggregated data collection forms and published in this release.
Hyd yma, mae data arbrofol ar gyfer yr un llwybr canser (gydag a heb ohiriadau) wedi cael eu casglu’n uniongyrchol drwy fyrddau iechyd a’u cyhoeddi gan Lywodraeth Cymru ers mis Mehefin 2019.