<prompt> Not true about stress fracture is?2nd metatarsal neck is involved in march fractureOlecranon is the most common site of upper limb stress fracturePars interaicularis of L4 is common site in spineMRI is the IOC  <response>: Pars interaicularis of 5th lumbar veebrae causing spondylolysis is commonest site in spine. Stress fracture Population at risk: Military recruits , professional dancers and athletes Patient typically complaints of point tenderness MC in lower limb- 2nd 3rd metatarsal march fracture MC in upper limb- oleceron process MC in spine -Pars interaicularis of 5th cervical veebra IOC-MRI Spondylolysis: 