title: Cytopathology of extramedullary hemopoiesis in effusions and peritoneal washings: a report of three cases with immunohistochemical study.
abstract: The clinical, cytopathologic, and immunohistochemical features of three cases of extramedullary hemopoiesis are presented. Differentiation of megakaryocytes from malignant cells can be difficult in cytologic material; we believe familiarity with cytologic features of megakaryocytes, along with factor VIII-related antigen immunoreactivity, is helpful in providing an accurate diagnosis.
mesh_terms: D000368:Aged; D001202:Ascitic Fluid / Q000473:pathology*; D005260:Female; D006402:Hematologic Diseases / Q000473:pathology*; D006410:Hematopoiesis; D006651:Histocytochemistry; D006801:Humans; D007124:Immunoenzyme Techniques; D008533:Megakaryocytes / Q000473:pathology; D008875:Middle Aged; D010537:Peritoneum / Q000166:cytology*; D010996:Pleural Effusion / Q000473:pathology*; D007507:Therapeutic Irrigation