Rock on the Heart: A Case of Calcifying Fibrous Tumor Arising From the Pericardium and Literature Review.

Calcifying fibrous tumors are rare benign fibrous tumors that rarely occur in the heart. We report a 33-year-old woman who was found to have a benign pericardial tumor on health checkup, which was highly suspected to be a teratoma in clinical and imaging examination. After cardiac tumor resection, histopathological features showed scattered foci of psammoma bodies or calcification among collagenized fibrous connective tissues and foci of inflammatory cell infiltration in the interstitium. The pathological diagnosis was a calcifying fibrous tumor.