Polycythemia vera and essential thrombocythemia with monoclonal gammopathy: experience of a single institution

We studied the incidence of monoclonal gammopathy (MG) in 382 consecutive cases of polycythemia vera or essential thrombocythemia (MPD) and in 500 normal controls, stratified by age. A non-significant higher incidence of MG was seen in the oldest group of MPD. The occurrence of MG in such MPD is therefore likely coincidental.