1. A 13-year-old girl with fibrous dysplasia affecting the sphenoid bone.
A 13-year-old girl with fibrous dysplasia affecting the sphenoid bone. A, Bone window on CT shows classic ground-glass attenuation in the sphenoid bone. B, The sphenoid sinuses are small and demonstrate mucosal disease. The lesion is hypointense on T2WI. C, This MR imaging appearance is likely attributable to the fibrous stroma, illustrated on the photomicrograph with HE stain demonstrating woven bone embedded in a spindle cell stroma (original magnification ×4). Fibrous dysplasia can have extreme heterogeneity on MR imaging and can be a confusing lesion to diagnose. Correlation with CT should always be done.
Y.W. Lui et al. AJNR Am J Neuroradiol 2011;32:
©2011 by American Society of Neuroradiology