Fig. 9.

A 57-year-old woman with a remote history of collagen filler injections developed facial lumps. Histologically proven FBGs (dashed arrows) in the right and left jowl fat units have high signal intensity on STIR (a), low signal intensity on T1 W image (b), and strong enhancement on fat saturated T1 W (c). The fibrosis around the granuloma (short white arrows in a, b) and the thickened right SMAS (short black arrow in b) and left SMAS (arrowhead) appear iso- hypointense on T1 W and hypointense on STIR images. On coronal post gadolinium fat saturated T1 W image, the degree of enhancement of FBG (dashed arrows in c) and of fibrosis around FBG (short arrows in c) appear similar and cannot be differentiated for each other on the basis of enhancement alone