The treatment for pediatric patients affected by Hodgkin's lymphoma, including chemotherapy and radiotherapy, has offered a high survival rate, but may be responsible for the appearing of breast cancer in later form in these same people. The 20-year survival rate can reach 90% of patients suffering from Hodgkin's disease, but they may suffer sequelae, among which malignant secondary neoplasms, including breast cancer. Most studies show that the malignancy of breast tissue is the main secondary sequel to radiotherapeutics’ treatment for patients with Hodgkin's lymphoma in childhood.   Keywords: Breast Cancer; Hodgkin's Lymphoma; Radiotherapy.