[Monoarthritis symptomatic of adjacent bone tumors. Study of 5 cases]

The authors present 5 cases of monoarthritis which revealed adjacent bone tumours: a bony metastasis, a fibrosarcoma and three bone lymphomas. In three cases, the synovial histology showed lesions of non-specific synovitis without neoplastic invasion. A review of the literature demonstrates the rarity of these mono- or oligo- arthrites adjacent to bone tumours and two types can be distinguished: neoplastic invasion of the synovium or reactive non-specific synovitis without invasion.