Squamous cell carcinoma of the hand metastasized to the breast: a unique case.

Metastatic squamous cell carcinoma (SCC) to the breast is a very rare entity with a few cases reported in the literature, while the hand as an extra-mammary origin site for this type of malignancy has not been reported before. We describe a unique case of a woman with a SCC lesion excised from the right index finger that metastasized to her ipsilateral breast. A 68-year-old female patient presented with a small palpable lesion of the right breast and without any skin ulceration or malformation.