<prompt> The earliest changes for evaluation of stress fractures are seen inBone scanBone biopsyCT scanMRI  <response>: Answer: d MRISTRESS FRACTURESMay occur in the pelvis, femoral neck, tibia, navicular and metatarsals.The metatarsals are involved in 55 of cases, whereas the sesamoids and talus are involved in less than 1Occurs dt significant increase in training and activity Runners fracture.Risk factors: female athlete, poor nutrition, low bone density, and a history of menstrual disturbance.MRI or technetium bone scans are the best diagnostic tests.Treatment: rest and avoidance of high-impact activities until healing occurs. 