A thyroid abnormality may develop about 5 yr after exposure, but the patient remains at increased risk for at least 30 to 40 yr after exposure.
A thyroid abnormality may develop about 5 yr after exposure, but the patient remains at increased risk for at least 30 to 40 yr after exposure.
照射后5年可能出现甲状腺异常，至少在接触放射线后30~40年间，病人仍处于肿瘤多危期。