Oncological Morbidity Pattern of Chernobyl Accident Workers from Latvia

摘要

Since exposure of workers to ionizing radiation during Chernobyl nuclear power plant (CNPP) disaster clean-up works 25 years have passed. Many of exposed persons have developed malignant tumours. The aim of our study was estimation of oncological morbidity tendencies among Latvian CNPP clean-up workers during the period from 1986 till 2010. Data of The Latvian State Register for Persons Exposed to Ionizing Radiation in Chernobyl were used for analysis. Significant oncological morbidity rise in CNPP clean-up workers appealed after 16 years latent period. Higher risk for malignant tuinour development was found in 1986-year participants comparing with 1987-1991 year participants. 1986-year clean-up workers had tendency to have malignancies in liver, pancreas, thyroid gland, haematopoietic system, brain, kidneys, urinary bladder and metastases without known origin more frequently than 1987-1991 year participants. High incidence of genitourinary neoplasms is prominent among CNPP clean-up workers of age 45-54 years, which may be interpreted as excretion result of incorporated long-living radioisotopes (such as strontium, caesium, plutoniuni) via kidneys.