Lymphoepithelial Carcinoma of the Breast.

Lymphoepithelial malignancy is an extremely rare carcinoma of the breast characterized by a confusing histopathological picture resembling medullary carcinomas, lymphoma, etc. It has also been reported in other regions of the body like salivary glands, nasopharyngeal area and sometimes the lung. Due to its rare presence and difficult diagnosis, the treatment is often prolonged and delayed. Here we present a case report of a 56-year-old lady who was eventually diagnosed as lymphoepithelial carcinoma of the breast. Her journey of evaluation and treatment was fraught with pathological nuances and an elimination drill of multiple differentials before concluding this rare diagnosis. Although lymphoepithelial-like carcinoma is a rare entity, multiple cases have been reported in the literature and their review is mandated to further our clinical knowledge about the oncological treatment and expected prognosis of such cases in the future. Our patient underwent a simple mastectomy, followed by chemotherapy, radiotherapy, and is completely asymptomatic now. She has been cancer-free for the last seven years so far.