Giant cell granuloma of the lung

In a 50-year-old man without bronchopulmonary symptoms a round mass lesion close to the hilum of the right lung was detected in a routine chest x-ray and confirmed by computed tomography. Histological examination o f two biopsy specimens did not result in a definitive diagnosis. Therefore thoracotomy with enucleation o f the focus was per f ormad. The histological picture o f the lesion is characterized by connective tissue proliferation, multinucleated giant cells, ossification, localised hemorrhage, deposits o f hemosiderin and foci o f foam cells. The findings are interpreted as a giant cell granuloma o f the lung.