The results compiled up to January 21, 2013 revealed that 41,947 (44.2%) of 94,975 children had thyroid ultrasound abnormalities. Together with 38,114 children (13,645 or 35.8% had thyroid ultrasound abnormalities) tested in the last half of Fiscal Year Heisei 23 (FYH23) from October 2011 through March 2012, a total of 55,592 (41.8%) of 133,089 Fukushima children have been found to have ultrasound abnormalities.
FY2012: 55.8% with no thyroid nodules or cysts, 44.2% with thyroid nodules or cysts
The Fukushima Prefecture Health Management Survey Planning Committee revealed that 10 of 186 eligible for the secondary examination from FYH23 were suspected of having thyroid cancer as a result of the examination. They reported that three of them were confirmed to have papillary carcinoma of thyroid gland and already had surgery. The remaining seven have 80% chance of having cancer based on their biopsy results.
The percentage of abnormalities from FYH24 at 44.2% is higher than previous results of 42.7% and 43.1%, and the overall abnormality rate, for FYH23 and FYH24 combined, of 41.8% is higher than the last result of 40%. The proportion of children with nodules equal to and larger than 5.1 mm and any size cysts have increased.