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Olivia Munn Details Breast Cancer Diagnosis and Early Detection

Published 30 March 2026

Olivia Munn, the actress known for roles in "The Newsroom" and "X-Men: Apocalypse," revealed her breast cancer diagnosis in March 2024 after an online risk assessment tool detected the disease despite no symptoms or prior warning signs. Diagnosed with Stage 1 bilateral Luminal B breast cancer in April 2023, Munn underwent multiple surgeries and has since become a prominent advocate for early detection, inspiring a surge in awareness and tool usage among women.

The diagnosis came unexpectedly for Munn, then 42, who reported feeling perfectly healthy with no family history of cancer and recent clear mammograms and ultrasounds. Prompted by a routine doctor's visit, she took the free Lifetime Risk Assessment Tool, also known as the BCRAT or Gail Model, which calculates lifetime breast cancer risk based on factors like age, reproductive history, and breast density. Her score of 37.3 percent exceeded the 20 percent threshold for high risk, leading to further tests including an MRI, ultrasound, and biopsy. These confirmed aggressive, fast-growing tumors in both breasts that imaging had missed.

Munn acted swiftly, undergoing a double mastectomy within 30 days of confirmation, followed...

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