TY - JOUR T1 - Normal <em>x</em> rays in Perthes disease JF - BMJ Case Reports DO - 10.1136/bcr.2007.132811 VL - 2009 SP - bcr2007132811 AU - C Meadows AU - F Monsell AU - A V Ramanan Y1 - 2009/01/01 UR - http://casereports.bmj.com/content/2009/bcr.2007.132811.abstract N2 - A 6-year-old boy was referred to the regional paediatric rheumatology service with a 1-year history of limp.The patient was initially thought to have an irritable hip and x rays including the frogs legs view requested … ER -