“…It is recognized that approximately 30-50% of MM patients carry cytogenetically abnormal clones (Kowalczyk et al, 1991;Durie, 1992;Jelinek et al, 1993;Lee et al, 1993;Ankathil et al, 1995;Sawyer et al, 1995). Nonrandom rearrangements involving chromosomes 1 and 14 (particularly 14q32), preferential gains of chromosomes 3, 5, 7, 9, 11, 15, and 19, and total or partial monosomies of chromosomes 6 and 13 (Dewald et al, 1985;Gould et al, 1988;van den Berghe, 1990;Weh et al, 1990;Taniwaki et al, 1994;Lai et al, 1995;Sawyer et al, 1995) have been reported. Structural rearrangements and gain or loss of sequences on chromosomes 1, 6, 13 and 14 occur in PCL Taniwaki et al, 1994;Perez et al, 1994;Dimopoulos et al, 1994;Heim and Mitelman, 1995).…”