Where are malignant plasma cells found in plasma cell myeloma?
a. Bone marrow and sometimes in the peripheral blood
b. Lymph nodes and liver
c. Spleen and liver
d. Bone marrow and lymph nodes
ANS: A
The malignant plasma cells in plasma cell myeloma are found in the bone marrow. Occasionally, but not often, they circulate in the peripheral blood. When they exceed 20% in the peripheral blood, or the plasma cell count exceeds 2.0 ´ 109/L, it is called plasma cell leukemia.
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