This study reports two cases of intracystic papillary carcinoma of the breast. Both patients applied to our hospital with rapidly growing mass lesions. One patient had mastectomy and sentinel lymph node biopsy and the other had breast conserving surgery and sentinel lymph node biopsy. Both had the diagnosis of intracystic papillary carcinoma. One patient received no adjuvant therapy wheareas the younger patient was recommended radiotherapy. Since these tumors are rarely seen, there is no evidence based guidelines for treatment. Tailored therapy is required in management of these patients.

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