Fig. 3From: Acute respiratory failure as initial manifestation of conventional osteosarcoma rich in giant cells: a case reporta Hematoxylin and eosin staining, ×20. b–d Hematoxylin and eosin staining, ×40. Neoplastic lesion composed of a mononuclear background and randomly positioned multinucleated giant cells (star). Red arrows Eosinophilic osteoid, with pleomorphism, in between neoplastic cells, black arrows areas of tumoral necrosisBack to article page