The supporting network of the bone marrow is composed of fat cells. The fat cells or stroma cells are not included in the differential. They are large cells with one or two small, light-staining nuclei surrounded by a great amount of clear-staining cytoplasm containing only a few thin threads of reticulin (verified by reticulin stain). This photomicrograph of stroma cells is rather unusual, as the cells are generally not recognizable because of disruption in the spread and staining of the specimen.
Course Section: 06. Microscopic Examination of the Bone Marrow
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