A rare mixed breast cancer of intraductal and solid papillary with tubular carcinoma histotypes in a young woman.

Mixed breast cancer, especially of uncommon breast cancer histotypes, is rare, limiting our understanding of the disease and influencing diagnostic and management outcomes. We report a case of mixed breast cancer, with features of intraductal and solid papillary and tubular carcinomas, which appeared in a young patient. Physical examination, ultrasonography, molybdenum target mammography, and histopathology were performed for a definitive diagnosis. Tumor resection followed by radiotherapy and adjuvant chemotherapy was selected as the therapeutic strategy, and the patient was followed up thrice post treatment. We discuss the detailed diagnosis, treatment, and follow-up, together with a literature review of mixed breast cancer, to help optimize clinical management of mixed breast cancer.