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A giant cell is a mass formed by the union of several distinct cells (usually macrophages). It can arise in response to an infection or foreign body.
Foreign-body giant cells in the lung. H&E stain.
Foreign-body giant cell reaction to a suture. H&E stain.
Cementoblasts & osteoclasts are found normally during the shedding of deciduous teeth. They are also found after tooth extraction.
Plasma - Hematopoietic stem cells
| Lymphoid - WBC
T cells: Cytotoxic CD8+, Helper CD4+/Regulatory, γδ, Natural Killer T cell
B cells: Plasma, Memory
Natural killer cells (Lymphokine-activated killer cell)
| Myeloid - WBC
Granulocytes (Neutrophil, Eosinophil, Basophil) - Mast cell precursors
Dendritic cells (Langerhans cells, Follicular dendritic cells)
Monocytes/Macrophages (Histiocytes, Kupffer cells, Langhans giant cells, Microglia, Osteoclasts)
Megakaryoblast - Megakaryocyte - Platelets
| Myeloid - RBC
Reticulocyte - Normoblast