At least 2 native telomere FISH signals were detected in 30% of the examined tumor cells in the LB857/ALT+-derived FFPE xenograft and even more in the frozen sample, whereas none of the nuclei had ≥2 native FISH signals in either the HT1080/TEL+ xenograft or normal lung tissue (Table 1). Here, ETV6 is linked to neoplasm.