Fig. 14.

Findings of possible breast implant rupture. a Deformity in contour. The border of the implant is bulging more than usual (called the “rat-tail sign” when very pronounced). Sometimes rupture cannot be differentiated from herniation. b Irregular margin. The border of the implant is blurry. Frequently seen with calcification of the fibrous capsule. c Changes in the signal intensity of the silicone gel. Water/serum mixed in the silicone gel through a defect in membrane. d “Noose sign” or “key-hole sign”. Small invagination of the shell where the two membranes do not touch. e “Teardrop sign”. Invagination of the shell containing a droplet of silicone. The last two images represent silicone gel leakage through a small focal implant shell tear