If this is true unilateral gynaecomastia affecting the right breast alone in a 71 year old male it should be investigated adequately. The term Atypia itself does not mean malignancy but cannot be totally ignored either. It may mean just a small focal non-malignant change in an otherwise benign proliferative condition of gynaecomastia or may mean a more serious disease in another area. My suggestion is that the cytology already available may be reexamined by a dependable cytopathologist (for example, if the patient is in Delhi then I suggest Sir Ganga Ram Hospital Dept. of Pathology-Division of cytopatholgy) and if necessary a proper repeat FNAC done by them. The result from that would decide if surgery is to be done. At any rate, as I said earlier, if this change is confirmed to be only on one side a limited surgery may be necessary.