In one patient with untreated CLL and a monoclonal serum IgA K, without
evidence of multiple myeloma, the bone marrow and lymph node plasma cells
contained a and K chains. A small percentage of lymphocytes from the bone
marrow, lymph nodes, and blood (maximum 6%) carried a and K determinants
while the majority of lymphocytes were shown to bear p. and A chains. In a
second patient with serum IgA A, all the features of multiple myeloma were
were double producers at the time of the second study.