MRI evaluation of military training related occult fracture of knee joint

SUN Qiu-de

Abstract：Objective To investigate the value and clinical significance of MRI in occult fracture of knee joint caused by military training .Methods Totally 150 patients,who failed to reveal suspected fractures from mili-tary training injury with X-ray plain films and underwent 1.5T MR knee examination ,were retrospectively analyzed . All patients were male with age ranged from 18 to 32 years,averaging 21.5 years.MRI examination was conducted 3 days to 35 days after injury ,with an average of 14 days.Results All cases had positive radiographic founding a-round the knee joints in MRI .Fifty-six cases were occult fracture , among them 32 patients with joint cavity effu-sion,27 cases with meniscus tear ,22 cases with anterior cruciate ligament injury and 8 cases with collateral ligament injury.Thirty-seven patients were followed up for 1 to 18 months,among whom 23 cases of local bone abnormal sig-nal disappeared ,14 cases of local abnormal signal weakened .Conclusion MRI can accurately display occult frac-ture of knee joint and its concomitant injury caused by military training in the early stage ,and can reflect the patho-logical changes of occult fracture .It has great value in the clinical diagnosis ,treatment and rehabilitation training .