Is a few short years, magnetic resonance imaging (MRI) has established for itself an increasingly prominent role in the evaluation of the solitary tumor or tumorlike lesion of bone.1–7This new technique now either complements or competes with preexisting diagnostic modalities that include radiography, conventional tomography, scintigraphy, computed tomography (CT), and arteriography. The authors' experience accrued from the evaluation of approximately 130 patients forms the basis of this article. MRI will be discussed with each of the other modalities in the context of their respective clinical roles. Conclusions can thereby be drawn for the appropriate use of MRI and can obviate redundant imaging procedures.