Fig. 1: Copy number (CN) variation in lipomatous tumors with 12q gain.

Distribution and frequency plots of CN gain in (a) Chr12 and (b) Chr1 from bulk DNA. Fluorescence in situ hybridization on metaphase spreads from c Case 10c, d Case 17 and e Case 18 shows that also low-level gained segments (green signals; MDM2 signals in red) are included in the ring chromosomes, as well as in the two normal homologues. Also, Case 17 (d) highlights the interchangeability between ring and rod-shaped chromosomes.