<prompt> Fall on heel with fracture os calcis is associated with commonly:Fracture clavicleFracture veebraFracture femurPosterior dislocation of hip  <response>: B i.e. Fracture veebrae Calcaneum is the most commonly fractrued tarsal bone and in most cases the mode of injury is fell front height over 20 of these patients suffer associated injury of spine most commonQ, pelvis or hip and base of skull Most commonly associated injury of veebral bodies -12, makes clinical radiological examination of lumbo dorsal spine necessary in patients of calcaneum fractureQ Fracture calcaneum is most often is associated with other injuries - 20 - Compression fracture of dorso - lumbar veebraeQ -10 - Fracture pelvis pubic rami and hip - Fracture base of skull atlanto -axial injury - Fracture talus - Veical compression fracture of lower end tibia 