Breast carcinoma metastasis is the most common carcinoma encountered in clinical practice. Cutaneous metastasis is one of the most distressing presentations of metastatic breast cancer. This may occur as the initial manifestation of undetected internal malignancy or the first sign of dissemination or even as the first sign of recurrence. Here, we report a case of skin metastasis, i.e. carcinoma en cuirasse in a 70 years old female who presented with painless, nodular, itchy skin lesion on right anterior chest wall extending to the right arm. On further examination, a hard lump of size 3x2x1cm was palpated in the right breast. FNAC of the breast and skin lesion were performed. Cytodiagnosis was given as infiltrating duct carcinoma of breast with metastatic carcinoma involving right anterior chest wall and right arm. So, skin lesion is an alarming sign and should be further evaluated.