Olivia Munn says she's doing great amid breast cancer journey

Olivia Munn told Good Morning America she is "doing great" while on treatment for bilateral luminal B breast cancer and said the medication has been tough.

Olivia Munn appeared on Good Morning America on March 30 to share an update on her breast cancer journey. She revealed she was diagnosed with bilateral luminal B breast cancer after earlier tests, despite a clear mammogram and ultrasound. Munn said she is "doing great" while continuing treatment, and described her medication as tough. She has spoken publicly about her experience and has encouraged use of a free lifetime breast cancer risk assessment. Key points: - The article reports Munn was diagnosed with bilateral luminal B breast cancer after tests following a clear mammogram and ultrasound. - On March 30 she told Good Morning America she is "doing great" but that the medication has been difficult and that she has experienced side effects such as nodules on her neck. - She has undergone multiple surgeries, which the article notes included a double mastectomy, a hysterectomy and a lymph node dissection. - Munn has urged women to use a free online lifetime breast cancer risk assessment that estimates 10-year and lifetime risk, and the article notes a 20% or higher lifetime score is considered higher risk. Summary: Munn remains in treatment and is speaking publicly about her experience to share what she learned and to highlight the risk assessment tool. Undetermined at this time.