title: Fibrosarcoma. Photopenic lesion on a bone scan.
mesh_terms: D000368:Aged; D001859:Bone Neoplasms / Q000000981:diagnostic imaging*; D004164:Diphosphonates; D005260:Female; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging*; D005354:Fibrosarcoma / Q000000981:diagnostic imaging*; D006801:Humans; D011877:Radionuclide Imaging; D013667:Technetium; D013669:Technetium Tc 99m Medronate; D013977:Tibia / Q000000981:diagnostic imaging*
chemical_list: D004164:Diphosphonates; D013667:Technetium; D013669:Technetium Tc 99m Medronate