title: [Megakaryocytic pseudomyelosis with severe thrombocytosis].
abstract: A 66-year-old female patient complained of loss of body weight and fatigue. The clinical examination revealed a thrombocytosis with a maximum count of 3.200 . 10(9) platelets and a leukocytosis with maximally 25 . 10(9) white cells in the peripheral blood. The bone marrow showed a large increase of megakaryocytes. Under the diagnosis of megakaryocytic myelosis a chemotherapy with 186 mg busulfan was performed. In the course of this treatment the clinical picture of a sepsis occurred which could not be controlled by antibiotics. The patient died four months after her admission to the clinic. The essential findings in autopsy were a caseous tuberculosis of the lymph nodes with haematogenic generalization which appeared as a septic tuberculosa gravissima ("typhobacillosis" Landouzy). The bone marrow was atrophic. Spleen liver and lymph nodes were without evidence for a myeloproliferative disorder. Thus, the initial diagnosis had to be changed to a megakaryocytic pseudomyelosis with massive thrombocytosis as a reaction to the tuberculous infection. The differential diagnosis of megakaryocytic myelosis, other disorders of the myeloproliferative syndrome, and the reactive thrombocytosis are discussed.
mesh_terms: D000368:Aged; D000469:Alkaline Phosphatase / Q000378:metabolism; D000510:Alpha-Globulins / Q000097:blood; D002066:Busulfan / Q000627:therapeutic use; D005260:Female; D006801:Humans; D007931:Leucyl Aminopeptidase / Q000378:metabolism; D008099:Liver / Q000201:enzymology; D013920:Thrombocythemia, Essential / Q000150:complications / Q000473:pathology*; D013922:Thrombocytosis / Q000188:drug therapy / Q000209:etiology*
chemical_list: D000510:Alpha-Globulins; D000469:Alkaline Phosphatase; D007931:Leucyl Aminopeptidase; D002066:Busulfan
vernacular_title: Megakaryozytäre Pseudomyelose mit hochgradiger Thrombozytose.