  In 2020, according to WHO, breast cancer affected 2.3 million women
worldwide, resulting in 685,000 fatalities. By the end of the year,
approximately 7.8 million women worldwide had survived their breast cancer
making it the most widespread form of cancer globally. Surgical treatment
decisions, including choosing between oncoplastic options, often require quick
decision-making within an 8-week time frame. However, many women lack the
necessary knowledge and preparation for making such complex informed decisions.
Anxiety and unsatisfactory outcomes can result from inadequate decision-making
processes, leading to complications and the need for revision surgeries. Shared
decision-making and personalized decision aids have shown positive effects on
patient satisfaction and treatment outcomes. This paper introduces Breamy, a
prototype mobile health (mHealth) application that utilizes augmented reality
(AR) technology to assist breast cancer patients in making informed decisions.
The app provides 3D visualizations of different oncoplastic procedures, aiming
to improve confidence in surgical decision-making, reduce decisional regret,
and enhance patient well-being after surgery. To determine the perception of
the usefulness of Breamy, we collected data from 166 participants through an
online survey. The results suggest that Breamy has the potential to reduce
patient's anxiety levels and assist them during the decision-making process.
