Learn about the three most important lines of latitude on Earth - the equator, Tropic of Cancer, and Tropic of Capricorn. Learn about the three most important lines of latitude on Earth - the equator, Tropic of Cancer, and Tropic of Capricorn.
General Discussion. Hairy cell leukemia (HCL) is a rare type of blood cancer characterized by abnormal changes in white blood cells known as B lymphocytes. The bone marrow creates too many of these defective cells, known as hairy cells because of the thin hair-like projections found on their surface.
DISCUSSION: Plasma cell leukemia (PCL) is a rare and aggressive variant of multiple myeloma with poor prognosis characterized by peripheral blood involvement. It is defined by the presence of circulating plasma cells exceeding 20% of peripheral blood leukocytes or 2 x 109/L [1].ISCUSSION: Plasma cell leukemia (PCL) is a rare and aggressive variant of multiple myeloma with poor prognosis characterized by peripheral blood involvement. It is defined by the presence of circulating plasma cells exceeding 20% of peripheral blood leukocytes or 2 x 109/L [1].