Axillary Breast Cancer Masquerading as Extramammary Paget Disease after Bilateral Total Mastectomy: A Case Report.

This case highlights the diagnostic challenges of MPD in atypical locations and underscores the importance of clinicopathologic correlation, particularly in patients with a history of breast cancer. It also emphasizes the need for individualized treatment strategies and long-term surveillance, even after mastectomy, to detect and manage rare recurrences. Clinicians must maintain vigilance for atypical presentations of recurrent or residual disease, as breast cancer can manifest unexpectedly years after definitive treatment.