A Case of a Giant Siliconoma Mimicking Localized Breast Cancer

Silicone gel-filled breast implants are widely used for breast augmentation and reconstruction after mastectomy. However, there are some known complications associated with silicone implants: Leakage and migration of silicone particles from the implant cause a granulomatous reaction. Granulomas may present as masses with features of malignancy on breast MRI. We present a case of a giant breast siliconoma in a woman who had undergone reconstruction with breast prostheses, which were surgically removed because of rupture 8 years ago. Teaching point: Despite increasingly efficient diagnostic tools, siliconoma diagnosis remains challenging.