No abstract

Nora's lesion, defined as a "well-marginated mass of heterotopic mineralization arising from the periosteal aspect of an intact cortex, without medullary changes" has a distinct radiological presentation and is part of a spectrum of reactive lesions which includes florid reactive periostitis and turret exostosis. As it has a distinct radiological appearance, differential diagnosis of malignant lesions such as osteosarcoma and chondrosarcoma should be clear. It does not require immediate biopsy unless the natural evolution is unspecific.

Preliminary results show that in the adult population fast contrast-enhanced MR imaging may assist in differentiation between benign and malignant cartilaginous tumors.

Dynamic, contract-enhanced, subtraction MR images may be useful to differentiate malignant from benign soft-tissue masses.

Gd-BOPTA increases liver lesion conspicuity and detectability and aids in the characterization of lesions.