Practical approach to extensive cutaneous spread without any underlying malignancy: a rare presentation of Paget's disease of breast.

Paget's disease of the breast is a rare intraepithelial malignancy involving the nipple-areola complex, often associated with an underlying in-situ or invasive carcinoma in the breast parenchyma. Most of the cases disease is usually limited to nipple-areola or surrounding periareolar skin. We are reporting a case of extensive Paget's disease, involving entire breast skin and even part of abdominal wall skin without any underlining breast pathology, which is a rare presentation.