An unusual cause of unilateral breast swelling.

A 69-year-old woman with bilateral breast implants and a newly inserted ventriculoperitoneal shunt presented with a 4-day history of swelling of the right breast. There were no signs of infection and blood tests were normal. With the help of ultrasound, mammogram, and computed tomography, the distal catheter of the shunt was found to be surrounding the right breast implant. During surgery the catheter was tunneled away from the breast and reinserted into the peritoneal cavity. She was discharged the next day. Ventriculoperitoneal shunt migration to the breast is a rare complication that can lead to cerebrospinal fluid accumulation and may be avoided by carefully tunneling away from the implant.