[Conservative treatment in orthopedic oncology surgery ?].

Bone tumors are and remain rare entities in our daily hospital clinical practice. Their appearance seems anecdotal but does not remain absent. They can manifest directly (pain, redness, functional impotence, suspicious mass, etc.) or indirectly (inflammatory or paraneoplastic syndrome, profuse sweating, emaciation, etc.). The most common benign bone tumors are non-ossifying bone fibroma. Then come osteochondroma and solitary bone cysts. For malignant tumors, osteosarcomas and chondrosarcomas are at the forefront. Primary bone lymphoma accounts for less than 1 % of these. In general, lymphomatous bone lesions are frequently metastasis from primary hematological lymphoma and are therefore treated by chemotherapy. An early surgical treatment of the bone tumor is most often not mandatory and a conservative therapy may represent a valuable option.