“…In 45 cases there were sufficient clinical data available to allow classification according to the staging system made by Durie and Salmon [49]; 5 cases (11%) had stage I disease, 11 (25%) stage II, and 29 (64%) stage III. MeM has earlier been correlated to high labeling index [50] and to PCL or circulating plasma cells [1,4,6,9,13,14,17,[25][26][27][28]. PCL have been reported to occur with a frequency of 1-5% of patients with MM, depending on the criteria used [17,51].…”