MR-IMAGING OF THE BREAST IN PATIENTS WITH SILICONE-GEL IMPLANTS - SPECTRUM OF FINDINGS

Because of recent concerns about the potential dangers of rupture and leakage of silicone-gel implants, radiologists are often requested to evaluate the integrity of normal breast implants. Clinical studies sug gest that MR imaging can accurately depict implant rupture. The purpos e of this pictorial essay is to illustrate the spectrum of MR appearan ces of breasts in patients with silicone-gel implants. Types of prosth eses range from the more common single-lumen silicone-gel implants to the rare foam-filled implants. Recognition of the variable appearance of intact implants is emphasized in order to distinguish these from in tracapsular or extracapsular ruptures. Finally, we briefly review vari ous investigational MR sequences designed to improve the evaluation of the integrity of silicone-gel implants and the localization of free s ilicone. This article is based on our experience in performing MR imag ing in more than 350 patients with breast implants. In more than 50% o f these patients, the MR imaging findings have been correlated with su rgical and pathologic findings.