Pacing Lead-Induced Granuloma in the Atrium: A Foreign Body Reaction to Polyurethane
Figure 1
Macro-and microscopic findings. (a) At autopsy, the pacemaker lead was entrapped by a nodule. After detachment of the lead from the nodule, the base of the nodule was 1.5 × 1.0 cm in size as shown by the arrows. The possible course of the lead was depicted by dotted lines. (b) The nodule had a broad basis on the endocardium of the right atrium. The edge was cut and used for microscopic examination (rectangle). (c) Histologically, the nodule revealed fibrosis, lymphocyte infiltration, small vessels, and hemorrhagic lesions.
