A Scalp Tumor Revealing Metastatic Breast Cancer: A Case Report.

Scalp metastases in invasive ductal carcinoma of the breast are extremely rare, occurring in less than 1% of patients. In large retrospective studies of cutaneous metastases, only a small proportion of patients with solid tumors develop skin involvement, with breast cancer being the most common source. We report a case of a patient who developed a single metastatic lesion involving the subcutaneous scalp tissue and the median frontal bone, with intracranial extension reaching the right temporo-occipital region, detected 11 years after the initial diagnosis and treatment of the primary breast tumor. This case highlights the importance of considering atypical metastatic sites during long-term follow-up of breast cancer survivors. It discusses the diagnostic and therapeutic challenges posed by such unusual presentations.