[NMR tomography in plasmacytoma].

In 20 patients with multiple myeloma, the results of MR, x-ray, bone scintigraphy, bone marrow scintigraphy and bone marrow biopsy were compared. MR proved the most sensitive imaging method for the detection of bone marrow infiltration followed by x-ray examinations. Bone marrow scintigraphy and especially bone scintigraphy revealed false-negative results more often. These findings were more impressive by the direct comparison of several investigated regions showing different findings of each imaging method. False-positive results were not found. In 4 patients false-negative results of bone marrow biopsy had to be assumed because of definitely pathological findings by x-ray and MRI.