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  • Title: Ultrastructural analysis of platelets and megakaryocytes from a dog with probable essential thrombocythemia.
    Author: Tablin F, Jain NC, Mandell CP, Hopper PE, Zinkl JG.
    Journal: Vet Pathol; 1989 Jul; 26(4):289-93. PubMed ID: 2763418.
    Abstract:
    Blood platelets and bone marrow megakaryocytes from a dog with essential thrombocythemia were analyzed by transmission electron microscopy and compared with those of control dogs. Platelets varied in size and shape and contained enlarged and dilated open canalicular systems. Megakaryocytes were dysmorphic and had evidence of abnormal maturation, with large numbers of megakaryoblasts containing alpha granules and poorly organized and reduplicated demarcation membranes. The fewer, more mature megakaryocytes lacked normal cytoplasmic organization. Most notable was the absence of well-demarcated "platelet fields," due to the excessive and disorderly array of demarcation membranes.
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