1 Epidemiology Branch National Cancer Institute-NIH Bethesda, Maryland
Among about 11,000 children irradiated for tinea capitis in Israel, an excess of head and neck tumors was found after a follow-up of 12 to 23 years (Modan, B. et al., Lancet, 1:277, 1974). The numbers of neoplasms in cases vs. comparable controls were brain, malignant 8 vs 1, benign 8 vs 1; parotid gland, malignant 4 vs 0, benign 3 vs 1; and thyroid, malignant 12 vs 2. There was no excess of leukemia of lymphoma, and benign thyroid neoptasms were not studied. The excess of malignant thyroid tumors was puzzling because the dose absorbed should have only been 6.5 rad.