2025. Late Retroperitoneal Metastasis from Invasive Ductal Carcinoma of the Breast: Diagnostic Challenges and the Role of Biopsy and Immunohistochemical Profiling — A Case Report. Journal of Carcinogenesis. 24, 10s (Dec. 2025), 570–574. DOI:https://doi.org/10.64149/J.Carcinog.24.10s.570-574.