The Laryngoscope · 1998
Increased risk of salivary gland tumors after low-dose irradiation.
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Modan B, Chetrit A, Alfandary E, Tamir A, Lusky A, Wolf M, Shpilberg O
Аннотация
OBJECTIVE: To assess the risk of neoplastic development among persons exposed to scalp irradiation.
STUDY DESIGN: Historical cohort study initially; prospective follow-up subsequently.
METHOD: Two control groups--population and siblings--matched for age, sex, ethnic origin, and year of immigration. Follow-up from time of irradiation (1950s) until the end of 1991. Linkage with nationwide cancer registry.
RESULTS: A 4.5-fold incidence of cancer (P < .01) and a 2.6-fold increase of benign tumors were noted. The mean length of latency period until tumor development was 11 years for malignant tumors and 21.5 years for benign. A clear dose response effect for both cancer and benign tumors was demonstrated.
CONCLUSIONS: The study confirms the role of radiation in salivary gland carcinogenesis. It indicates a need for better awareness, a comprehensive examination, and long-term follow-up of patients who have been subjected to head and neck radiation.
STUDY DESIGN: Historical cohort study initially; prospective follow-up subsequently.
METHOD: Two control groups--population and siblings--matched for age, sex, ethnic origin, and year of immigration. Follow-up from time of irradiation (1950s) until the end of 1991. Linkage with nationwide cancer registry.
RESULTS: A 4.5-fold incidence of cancer (P < .01) and a 2.6-fold increase of benign tumors were noted. The mean length of latency period until tumor development was 11 years for malignant tumors and 21.5 years for benign. A clear dose response effect for both cancer and benign tumors was demonstrated.
CONCLUSIONS: The study confirms the role of radiation in salivary gland carcinogenesis. It indicates a need for better awareness, a comprehensive examination, and long-term follow-up of patients who have been subjected to head and neck radiation.