our results ( a ) confirm that b lymphocyte precursors in iga plasma-cell myelomas are involved in the malignant process , ( b ) show that b lymphocytes of the malignant clone include those expressing each of the major heavy-chain isotypes , mu , delta , gamma , and alpha , and ( c ) provide strong circumstantial evidence that pre-b-cell members of the malignant clone are also increased in frequency .
C0026764
plasma-cell myelomas
C0004561
b lymphocytes