title: Malignant histiocytosis (histiocytic medullary reticulosis) with spindle cell differentiation and tumour formation.
abstract: Malignant histiocytosis (histiocytic medullary reticulosis) in a 45-year-old white man is described. Unusual features were presentation as a surgical emergency with signs of obstruction and peritonitis due to an ileal tumour and extensive spindle cell differentiation. Problems in the differential diagnosis of malignant histiocytosis are briefly discussed.
mesh_terms: D001853:Bone Marrow / Q000473:pathology; D001854:Bone Marrow Cells; D005260:Female; D006644:Histiocytes / Q000473:pathology; D006801:Humans; D007082:Ileum / Q000473:pathology; D007414:Intestinal Neoplasms / Q000473:pathology*; D008198:Lymph Nodes / Q000473:pathology; D008206:Lymphatic Diseases / Q000473:pathology*; D008875:Middle Aged