Carcinoma of the breast at the site of migrated pacemaker generators.

We report two patients in whom breast malignancy developed in the proximity of 'migrated' pacemaker generators. These cases and the similar ones reported in the literature raise concerns whether this association is merely coincidental or whether the pacemaker generator is responsible for the occurrence in some inexplicable manner. We urge for a routine, careful examination in all patients with implanted pacemaker generators at follow-up visits. This would help in (a) timely detection of migration of the pacemaker generators and (b) earlier diagnosis of any mass developing close to the migrated generators.