“…[76,96] On RDD, in addition, on contrast-enhanced T1-weighted images with gadolinium, the lesions are markedly enhanced, homogeneously or inhomogeneously, and the dural tail sign can commonly be found. [1,47,56,94,150,184,187,196,201] Recently, new MRI sequences have been recommended for the diagnosis of RDD, such as diffusion tensor imaging (DTI), susceptibilityweighted imaging, and perfusion-weighted imaging, [71,77] in addition, the use of 18F-FDG PET/CT has been described to diagnose relapsed intracranial RDD of the hypothalamus in a patient. [39] MRI spectroscopy meningiomas have been shown to have elevated Cho and decreased NAA, which is also seen in many other neoplastic processes, decrease in Cr and prominent Ala, much more so than in other neoplastic processes and is considered a spectroscopic signature for meningiomas.…”