Abstract

1. Introduction
Mammary angiosarcomas are rare malignant mesenchymal tumors, which develop at the expense of conjunctival mammary vascular tissue. They represent 0.04% of malignant breast tumors and 8 to 10% of all mammary sarcomas [1]. There are two forms: a primary without a known precursor, and a second secondary to breast irradiation [2]. The incidence of the radiation-induced form is increasing given the growing number of patients who are candidates for breast-conserving treatment. We report the observation of a radiation-induced angiosarcoma in a 61-year-old patient who underwent conservative surgery for ductal carcinoma of the left breast, secondly associated with adjuvant radiotherapy 6 years ago. Through the latter we will discuss the epidemiological, diagnostic, therapeutic and evolutionary aspects of this type of tumor.