An independent review into Invercargill's Awanui Labs is needed after doctors twice missed signs a woman had cancer, Patient Voice Aotearoa says. The lab failed to detect the 74-year-old retired nurse had stomach cancer, despite analysing multiple biopsies with cancer cells present. It meant her treatment was delayed by nine months and she died a year later . The lab is privately owned, but is contracted by Health New Zealand to provide medical laboratory and pathology services. The retired nurse was referred to Southland Hospital by her GP for recurrent gastrointestinal bleeding in 2021 and had a number of tests. A Health and Disability Commission report, released last month, found Awanui Labs did not ensure reasonable care and skill in providing services to the patient. Advocacy group Patient Voice Aotearoa wants the government to conduct an independent review of histology testing undertaken at Invercargill by Awanui Labs from 2021 to 2023.…