Calcifying fibrous pseudotumor of the chest wall.

This report concerns the finding of a clinically benign 4-cm mass in the anterior thorax of a 12-year-old girl. The tumor was inseparable from the chest wall. A wide excision was performed. Microscopic examination proved it to be a rare but distinctive lesion recently entitled "calcifying fibrous pseudotumor" primarily involving the chest wall. Wide excision is thought necessary to preclude local recurrence.