Review of imaging modalities and radiological findings of calvarial lesions

Figure 26  Calvarial solitary metastasis of a lung neuroendocrine tumor in fifty-nine years old male patient. A: Axial computed tomography on the bone window shows a soft tissue lesion (arrow) in the extra-axial region between the scalp and the parietal bone on the left parietal side and adjacent to the inner table, without obvious deformation of the bone structure; B: Axial 68Ga-DOTATATE positron emission tomography shows heterogeneous, slightly enhanced uptake (SUVmax: 2.22) in the mass lesion in the left parietal scalp (arrow); C: Axial T2-weighted image shows heterogeneous mildly hypointense signal uptake in the left parietal bone and soft tissue components in the scalp (arrows) with extra-axial distance without significant destruction of the cortical surfaces; D: Diffusion restriction in the mass shows on apparent diffusion coefficient map (arrows); E: Coronal contrast enhanced BRAVO image shows contrast enhancement (arrows) in the parietal bone and soft tissue components; F: Axial fat-saturated contrast enhanced T1-weighted image shows intense heterogeneous contrast enhancement (arrows) in the metastatic mass.