Ewing's postulates concerns with which of the following:

Ans: a. Growth at the site following trauma(Ref Parikh 6/e p4.89).Ewing's Postulates:Ceain criteria, known as `Ewing's postulates', must be satisfied before a relationship between trauma and new growth is accepted:The tumor must arise exactly at the site injuredDefinite and substantial trauma must be provedThe tumor must be confirmed pathologicallyThe tissue at the site must have been healthy before the traumaA reasonable interval-neither too long or too sho--must elapse between the time of the trauma and the appearance of the tumorThough not one of the Ewing's original postulates, there should be some good scientific reason for ascribing the tumor formation to the injury and this is rarely possible.