Multiple Calcifying Fibrous Pseudotumors Disseminated in the Pleura

Calcifying fibrous pseudotumor is an extremely rare benign lesion that develops in the pleura. We describe a case of multiple lesions in the pleura. The patient is a 52-year-old woman who had a subpleural mass on chest roentgenogram. The diagnosis was established by percutaneous needle biopsy. The largest tumor was hanging down from the parietal pleura, and additional small nodules were disseminated throughout the pleural cavity. Only a few tumors arising from the largest one were resected, and the others were left unresected. The resected tumors consisted of collagenous fibrous tissue, calcifications, and spindle cells that were positive only for vimentin immunostaining.