Supernumerary breast masquerading as metastasis on serial 67Ga scan.

We report the incidental discovery of supernumerary breast changes on sequential ⁶⁷Ga scans in a woman with dermatofibrosarcoma protuberans excised 5 years before. The appearance of the accessory breast fluctuated with physiological ⁶⁷Ga uptake of the breast tissue was evident. Awareness of the concomitant changes in accessory breast with breast tissue could help narrow the differential diagnosis.