As the amplification of the BCL2 gene in primitive STUMPs and their corresponding relapsed tumors have been previously reported [5], an analysis of BCL2 data was performed, revealing copy number gain or amplification in 13 samples: one leiomyoma (LM2), four primary STUMPs (STUMP10, STUMP11, STUMP12, STUMP13), two relapsing STUMPs (STUMP3 and STUMP4), one relapsed STUMP (STUMP6), three primary leiomyosarcomas (LMS2, LMS3 and LMS4) and two relapsed LMSs (LMS1 and LMS5) (Table S1 and Table 3). Here, BCL2 is linked to leiomyosarcoma.