The 5th Edition of the WHO Classification of CNS Tumours [1] introduced CRINET as a provisional diagnosis; it is a non‐rhabdoid neuroectodermal tumor with a prominent cribriform arrangement of tumor cells that have characteristic loss of INI1 due to homozygous loss‐of‐function of SMARCB1. The gene discussed is SMARCB1; the disease is neoplasm.