The Ombudsman found that "surgery was too risky for symptom control only, unless [the patient] had wished to proceed on a fully informed basis."
Upholding the family's complaint he said he "found that the surgeon was acting at the limit of his skills in undertaking such complex surgery."
More top news
One-year-old sheepdog Nell was stolen from a farm on the outskirts of Dolgellau.
Police are investigating an allegation that a young child was approached by a stranger in Llanelli.
An unsettled few days are in store, with rain and wind expected.