Benign Phyllodes tumor with massive squamous metaplasia

Phyllodes tumors are rare fibroepithelial tumors of the breast accounting for less than 0.5 percent of all breast neoplasms. Majority of these tumors occur in women, the median age at presentation is 42 to 45 years. They are classified by WHO into benign, borderline and malignant categories. Although squamous metaplasia is more often encountered in phyllodes tumors as compared to fibroadenomas, it is usually focal and not extensive.We present a case of benign phyllodes tumor with extensive squamous metaplasia and keratin filled cysts which has not been reported so fa