Breast carcinoma en cuirasse is a very rare form of cutaneous metastases of 
breast cancer. The clinical presentation is that of a diffuse indurated 
carcinomatous infiltration of the skin and subcutaneous tissues of the mammary 
region and the anterior aspect of the chest. In most cases, breast carcinoma en 
cuirasse develops post-mastectomy and represents a dramatic presentation of an 
aggressive tumor associated with a dismal prognosis. Because of the rarity of 
this type of malignancy, the optimal approach to treatment has not been clearly 
defined. The systemic treatment has been associated with limited efficacy, and 
the primary goal is palliative care and preservation of the quality of life 
through skin-directed therapies. Herein, a very rare case of primary breast 
carcinoma en cuirasse is presented, along with a review of the literature. Early 
diagnosis and prompt treatment of any potential skin metastases of breast cancer 
are essential to prevent the catastrophic natural progression of the disease.