RT Journal Article SR Electronic T1 A 76-year-old man with progressive lower back pain and right thigh swelling JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 86 OP 87 DO 10.1136/emermed-2011-200785 VO 29 IS 1 A1 Jeng-Sen Tseng A1 Chi-Ying Wu A1 Hsiang-Fan Cheng A1 Po-Sung Li A1 Jian-Ri Li A1 Bor-Jen Lee YR 2012 UL http://emj.bmj.com/content/29/1/86.2.abstract AB