Fig. 2: Light and transmission electron microscopy of bone marrow.
From: Thromboembolism after COVID-19 vaccine in patients with preexisting thrombocytopenia
A Haematoxylin and eosin stain shows two large size degranulated megakaryocytes (asterisks) (scale bar 20 µm). B Toluidine blue stain displays a degranulated megakaryocytes with a large and segmented nucleus (asterisks) (scale bar 20 µm). C, D Degranulated megakaryocytes with fragmented nuclei (asterisks) (scale bar 10 µm). E Electron micrograph shows a megakaryocyte with rare immature/degenerated platelet granules. The cytoplasm included large amount of degenerating electrodense material (asterisk). The square highlights high magnification of an immature platelet granule (scale bar 5 µm). F A megakaryocyte with no/rare platelet granules (scale bar 5 µm).
