Unusuals in Breast Pathology Part I: Invasive micropapillary carcinoma of breast

Invasive micropapillary carcinoma is recognized as a rare but distinctive variant of carcinoma in various anatomic sites, including breast, lung, ovary, endometrium, [6].major salivary glands and urinary bladder It is characterized by epithelial tufts forming micropapillae without a fibrovascular core located within clear stromal spaces.They usually present as a solid mass with a very high frequency of metastasis to lymph nodes.We report a case of 61 year old woman with a breast lump which was initially diagnosed as a low grade malignancy on cytology and revealed features of invasive micropapillary carcinoma on histopathology.