The production of micronuclei in lymphocytes was observed in 38 pationts with oesophageal cancer who had received fractionated local radio-therapy.The cumulative dose varied from 2,000 to 10.000r.

• 正>在辐射诱发的染色体畸变中,除了倒位和相互易位外,几乎都伴有断片的产生。