Clinical ImageSimultaneous hot and cold thyroid nodules: Which is malignant?Yuki Otsuka, M.D.1, Yasuhiro Nakano, M.D.1, Daisuke Omura, M.D., Ph.D.1, Takayuki Iwamoto, M.D., Ph.D.2, Ruiko Hayashi, M.D.3 and Fumio Otsuka, M.D., Ph.D.11Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan