Calcifying fibrous pseudotumor has recently been described in the soft
tissues. It is a rare benign lesion characterized by the presence of
abundant hyalinized collagen with psammomatous or dystrophic calcifica
tions and lymphoplasmacytic infiltrate. We report a case of a young wo
man with a mediastinal mass treated by a complete resection. The mass
had all the pathologic features of calcifying fibrous pseudotumor. (C)
1997 by The Society of Thoracic Surgeons.