Plaque, skin
A broad, raised area on the skin. A skin plaque is broader than it is high.
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- Plasma
The liquid part of the blood and lymphatic fluid, which makes up about half of the volume of blood. Plasma is devoid of cells and, unlike serum, has not clotted. Blood plasma contains antibodies and other proteins. It is taken from donors and made into medications for a variety of blood-related conditions.
- Plasma cell
A type of white blood cell that produces and secretes antibodies. A plasma cell is a fully differentiated, mature lymphocyte in the B cell lineage. As with most cell types, plasma cells can mutate to give rise to cancer. Plasma cell malignancies include plasmacytoma, multiple myeloma, Waldenstrom macroglobulinemia, and plasma cell leukemia. Also known as […]
- Plasma donation
The donation or sale of blood plasma for use in medical or other products. Unlike blood donors, most plasma donors in the US are paid. The procedure is done in a walk-in facility, where whole blood is taken through an IV needle and separated into plasma and blood cells. The blood cells are then returned […]
- Plasma osmolarity
The osmolarity of blood plasma, which is a measure of the hydration status. The plasma osmolarity is sensitive to changes in hydration status during dehydration and rehydration. The normal plasma osmolarity is in the range of 280-300 mOs/kg. This may vary somewhat from laboratory to laboratory.
- Plasmacytoma
Cancer of the plasma cells (white blood cells that produce antibodies) that may turn into multiple myeloma.