ASPSCR1 and neoplasm: ASPS-1, the cell line developed from the xenograft tumor [16], also expresses the ASPL-TFE3 type 1 fusion transcript and the ASPL-TFE3 type 1 fusion protein, the t(X;17)(p11;q25) translocation characteristic of ASPS and many of the up-regulated ASPS gene transcripts identified in the xenograft model.