Fine-needle aspiration of a metastatic breast carcinoma in the lung with melanin pigmentation: a case report.

The presence of melanin pigment in the cytoplasm of breast carcinoma cells has been reported. Fine-needle aspiration of a solitary lung lesion in a woman who had undergone mastectomy for ductal carcinoma revealed malignant cells consistent with the primary mammary tumor; many of these tumor cells contained melanin pigment.