title: Fine needle aspiration cytologic findings in a case of sinus histiocytosis with massive lymphadenopathy (Rosai-Dorfman syndrome).
abstract: The clinical, fine needle aspiration (FNA) cytologic and histologic findings in a case of sinus histiocytosis with massive lymphadenopathy (SHML) in a five-year-old boy are presented. The FNA smears showed a proliferation of plasma cells, lymphoid cells and histiocytes demonstrating emperipolesis that is characteristic of this benign disorder; these cytologic findings were reported as a reactive lymphoid infiltrate with a high content of benign histiocytes. The diagnosis was made on a subsequent open biopsy performed on the persistent lymphadenopathy. The differential diagnosis of lymph nodes containing a prominent component of histiocytes is discussed.
authors: Department of Pathology, University of California, Los Angeles.
authors: L J
authors: LJ
authors: Layfield
mesh_terms: D001707:Biopsy, Needle; D002675:Child, Preschool; D003937:Diagnosis, Differential; D006644:Histiocytes / Q000473:pathology; D015618:Histiocytosis, Sinus / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008214:Lymphocytes / Q000473:pathology; D008297:Male