title: Two cases of radiation-induced cancers 20 years after treatment of first malignancies.
abstract: Studies on radiation-induced breast and thyroid cancers have demonstrated that age at exposure is a major determinant of risk, with the greatest risk being for those irradiated as children and adolescents. In measuring the outcome of treatment, the ability to provide toxicity-free survival and minimal risk of second cancer may in future be regarded as important as achieving disease-free survival or local control. Herein we present two cases of secondary cancer with good treatment outcome that occurred 20 years after treatment for primary malignancies in childhood.
authors.affiliation: Department of Radiotherapy, National Hospital of Oncology, Sofia, Bulgaria.
authors.forename: V
authors.initials: V
authors.lastname: Parvanova
authors.forename: E
authors.initials: E
authors.lastname: Petkova
authors.forename: A
authors.initials: A
authors.lastname: Tzonevska
authors.forename: E
authors.initials: E
authors.lastname: Krasteva