PMID: 6970599Apr 1, 1981Paper

Hairy cell leukemia and myelomatosis: chance association or clinical manifestations of the same B-cell disease spectrum.

Blood
D CatoveskyM O'Brien

Abstract

We describe three patients who had typical features of hairy cell leukemia (HCL) and multiple myeloma (MM) at the same time. In two, both diagnoses were made within a short period of time, and in the third, HCL had been present for 2 yr before the appearance of a paraprotein, bone lesions, and plasma-cell infiltrates established the diagnosis of MM. Although this association has not been previously reported, cases of HCL with osteolytic lesions or a paraprotein band have been described. The cases described may represent clinical manifestations of closely related disorders arising from divergent differentiation from a common B-cell precursor rather than a chance association.

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