Japanese Society of Internal Medicine Acta Medica Okayama 0918-2918 58 5 2019 Crowned Dens Syndrome Associated with Hyperuricemia 765 765 EN Yuusaku Sugihara Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Hiroko Ogawa Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Fumio Otsuka Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences No potential conflict of interest relevant to this article was reported.