TY - JOUR T1 - Retroperitoneal fibrosis misinterpreted as an abdominal aortic aneurysm on ultrasound JF - BMJ Case Reports DO - 10.1136/bcr.08.2011.4658 VL - 2011 SP - bcr0820114658 AU - Daniel Bye AU - Tom Wiggins AU - Bernadette Pereira AU - Stephen Brearley Y1 - 2011/09/30 UR - http://casereports.bmj.com/content/2011/bcr.08.2011.4658.abstract N2 - A 57-year-old Polish gentleman presented with persistent upper abdominal pain exacerbated by eating. Abdominal ultrasound scan performed in Poland showed a 4.4 cm mass in the region of the abdominal aorta reported as an abdominal aortic aneurysm. Subsequent CT imaging demonstrated a normal calibre aorta, surrounded by a soft tissue mass in conjunction with left-sided hydronephrosis (figure … ER -