Undiagnosed nephrogenic diabetes insipidus as a cause of acute urinary retention in a young soldier Hyung Jin Kim1, YS Shin1,2, H Choi2, MK Kim1, YB Jeong1 and JK Park1 1Department of Urology, Chonbuk National University Medical School, Jeonju, Korea 2Department of Urology, Armed Forces Capital Hospital, Seongnam, Korea Correspondence to Capt Y S Shin, Department of Urology, The Armed Forces Capital Hospital, 66 Yuldong-2-gil, Bundang-gu, Seongnam 463-040, Korea; ball1210{at}hanmail.net...