Fig. 10From: Magnetic resonance imaging of breast augmentation: a pictorial reviewKeyhole sign (left breast) and teardrop sign (right breast). Silicone-only axial MR image shows keyhole sign (small arrow) at left breast. The invaginations of implant shell do not touch each other. Tear-drop sign is seen at right breast (large arrow), with the invaginated membranes contacting one anotherBack to article page