Malignancies arising from burn scars though rare are well documented in the literature; squamous cell carcinoma is the most common burn scar neoplasm, and adenocarcinoma is an extremely uncommon and rarely reported tumor in these scars. We hereby report a case of a young woman who presented with a rapidly growing lump in a scar in the mammary region that sustained severe burns 20 years back. It was diagnosed as duct carcinoma breast on cytology and later confirmed on histopathology and immunohistochemistry. The case mandates regular follow-up of patients with post-burn scars, and any lump arising in that region should be promptly investigated.