They found that 47% of cases were PD-L1 positive (≥1% of positivity in tumor cells or TILs), and that this was more frequent in extracranial sites, with 4/4, 4/9, 1/9, and 1/1 in ES, ERRT, ATRT, and anaplastic chordoma being PD-L1 positive. Here, CD274 is linked to neoplasm.