A 30-year-old woman with a bilateral hypomastia underwent subfascial TBA with texturized anatomic silicone implants (Natrelle 410 MF style, 295cc) (Fig. 1a-d). One year after surgery, the patient noticed a painful mass in the medial lower part of her right breast. At that time a breast seroma or capsular contracture was suspected. A breast ultrasound was performed and showed no sign of seroma. Magnetic resonance imaging (MRI) revealed a solid mass (6.1 x 3.1 x 4.1 cm) with low/intermediate signal intensity in T1 and high signal intensity in T2. The mass exhibited high contrast medium enhancement without signs of infiltration of the fatty tissue or the costal cartilage (Fig. 2a and b). After discussing the case with thoracic surgeons and radiologists, the decision was made to plan a wide resection.