Primary Squamous Cell Carcinoma of Breast in a Young Female: An Institutional Experience with Review of Literature

Invasive or infiltrating ductal carcinoma is the most common type of breast cancer while primary squamous cell carcinoma of breast is extremely rare occurring in 0.04%-0.1% of all breast cancer cases known for aggressive behaviour and poor prognosis. We hereby report a case of primary squamous cell carcinoma of breast in a 31-yearold female who presented with a left breast lump of 2 months duration. Lumpectomy done at another non-oncology centre showed invasive ductal carcinoma with margin positivity for which she underwent modified radical mastectomy at our institute. Post-operative immune-histopathology revealed triple negative squamous cell carcinoma. Her metastatic work-up with whole-body positron emission tomography scan was negative. She was treated with adjuvant chemotherapy doxorubicin, cyclophosphamide and docetaxel followed by loco-regional radiotherapy to left chest wall which she tolerated well. No hormonal therapy was given in view of hormone receptor negativity. She is presently on follow-up for more than 6 months without any evidence of recurrence or distant metastasis. This case is being presented to highlight its extreme rarity, it’s occurrence in a young female, the diagnostic and therapeutic challenges it presented and the overall prognosis of this neoplasm.