SMARCB1 and hemoglobin measurement: For patients on AHEP0731 with HB with SCU histology (33 of 35 with retained INI1 expression), the five-year event-free survival (EFS) was 86%, 81%, and 29% for patients with low, intermediate, and high-risk HB (compared with five-year EFS of 87%, 88% and 55% for those with HB without SCU) [10].