MRI findings and X-ray appearance of primary myelofibrosis in marrow of lumbar vertebra and pelvis / 中华放射学杂志

ABSTRACT

Objective To evaluate MRI findings and X ray appearance in primary myelofibrosis (PMF) in marrow of lumber vertebra and pelvis. Methods Eleven cases of PMF with integrated clinical and pathology data were collected. All cases were examined with X ray and MRI simultaneously. The imaging findings of PMF were studied and compared with that of normal group. The MRI findings and X ray appearance of cases with PMF were evaluated and compared with each other to find their good quality, the shortcoming, and the relationships. Results X ray appearance in the plain film in cases with PMF There were no abnormal findings in lumbar vertebra, iliac bone, and superior segment of femur in 5 of 11 cases. Blurred bone trabecula and ground glass changes in bone marrow were found in 3 of 11 cases. In another 3 cases, the bone trabeculas were obscured, tightly closed or mixed together, and the density of bone marrow were widespreadly high, and the difference in it couldn′t be distinguished. MRI findings in cases with PMF MRI findings in different parts of lumbar vertebrae, iliac bone, and femur superior segments in all 11 cases were consistent. Compared with the control group, both images on T 1 and T 2 weighted spin echo displayed diffusely and well distributed lower signal intensity in 6 of 11 cases, but displayed scattered spot and patchy lowersignals in 5 of 11 cases in all parts of bone marrow including lumbar vertebra, iliac bone, and superior segment of femur. The extents of lower marrow signal intensity varied in different cases. The high signal in femoral head and greater trochanters remained unchanged as that of subcutaneous fat in 4 of 11 cases. The positive rate was 54.6%(6/11)in X ray findings, but 100%(11/11)in MRI appearances. Conclusion MRI has greater value than X ray in the early diagnosis of PMF. The early diagnostic value of X ray plain film for PMF is limited.