title: Atypical lymphohistiocytic bone tumour (osseous variant of Rosai-Dorfman disease?).
abstract: A single osteolytic bone tumour with a cellular composition similar to that of the extra-nodal localization of Sinus Histiocytosis with Massive Lymphadenopathy although with greater cellular atypicality is described. This histological similarity suggests the possible occurrence of isolated bone involvement of Rosai-Dorfman disease, with atypical cytology but benign evolution, which has not been reported in the literature.
mesh_terms: D001859:Bone Neoplasms / Q000473:pathology*; D006651:Histocytochemistry; D006801:Humans; D008206:Lymphatic Diseases / Q000473:pathology*; D008218:Lymphocytosis / Q000473:pathology; D008297:Male