Fig. 16
From: Orbital tumours and tumour-like lesions: exploring the armamentarium of multiparametric imaging
64-year-old female patient with headache and left vision loss underwent MRI. a. Axial T2W image of the orbits shows deformity and expansion of the sphenoid body. The medullary cavity is replaced by tissue with mixed hyperintense (thick arrow)–hypointense (thin arrow) signal. b. Axial T1W image of the same patient shows the lesion to be mainly isointense to brain parenchyma (thick arrow) and with strongly hypointense central areas (thin arrow). On the left, there are hyperintense peripheral regions. c. Axial contrast-enhanced T1W image shows inhomogeneous contrast enhancement (thick arrow) and cystic portions (dashed arrow). d. ADC map reveals increased diffusion (ADC = 2.3 × 10 −3 mm2/s) suggesting a benign lesion (thick arrow). FD was suspected. e. Oblique reformatted axial image from 3D T2W sequence shows compression of the left optic nerve (thin arrow) at the level of the optic canal. f. Axial NECT image shows ground-glass appearance and irregular ossification of the involved bones. Part of the lesion was resected to decompress the right optic nerve. Histology revealed psammomatous variant of FD