The Radiotoxicity of 131I Therapy of Thyroid Cancer: Assessment by Micronucleus Assay of B Lymphocytes
Naoto Watanabe, MD1,
Hirokazu Kanegane, MD2,
Seigo Kinuya, MD3,
Noriyuki Shuke, MD4,
Kunihiko Yokoyama, MD3,
Hiroshi Kato, MD1,
Gakuto Tomizawa, MD1,
Masashi Shimizu, MD1,
Hisashi Funada, MD5 and
Hikaru Seto, MD1
1 Department of Radiology, Toyama Medical and Pharmaceutical University, Toyama, Japan
2 Department of Pediatrics, Toyama Medical and Pharmaceutical University, Toyama, Japan
3 Department of Nuclear Medicine, Kanazawa University, Kanazawa, Japan
4 Department of Radiology, Asahikawa Medical University, Asahikawa, Japan
5 Department of Clinical Infectious Diseases, Toyama Medical and Pharmaceutical University, Toyama, Japan

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FIGURE 1. Photomicrographs of binucleated cells, including one without (A) and one with (B) a micronucleus (M).
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FIGURE 2. The frequency of micronuclei among peripheral lymphocytes and B lymphocytes before and after 131I therapy.
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FIGURE 3. The increased number of micronuclei among peripheral lymphocytes and B lymphocytes.
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Copyright © 2004 by the Society of Nuclear Medicine.