Rosai-Dorfman Disease is a very rare systemic immunologic disease, but most patients show improvement without specific treatment. However, when confined to the breast, it is difficult to exclude from malignancy since they are share similar radiographic characteristics. Thus, we report a case of Rosai-Dorfman Disease confined to the breast that pathological confirmation is needed to diagnose the disease via core needle biopsy or surgical excision.

Introduction
 Case report
 Discussion
 References

• Woo Young Sun(Department of Surgery) Corresponding author
• Hae Joung Sul(Department of Pathology, Daejeon St. Mary's Hospital, College of Medicine,The Catholic University of Korea, Seoul, South Korea)
• Jina Lee(Department of Surgery)
• Bong Kyun Kim(Department of Surgery)