Atlas One · Host Biology · Scale 07 — System

Atypical Teratoid/Rhabdoid Tumor

AT/RT (atypical teratoid/rhabdoid tumor) is an aggressive CNS WHO grade 4 pediatric tumor defined by SMARCB1 biallelic LOF (~95%) or SMARCA4 LOF (~5%); peak <3 years; three molecular subgroups (TYR, SHH, MYC); multimodal therapy; 2-year OS ~40-50%; germline SMARCB1 → RTPS1.

Also known as: AT/RT, atypical teratoid rhabdoid tumor, ATRT, rhabdoid tumor brain, INI1-deficient CNS tumor, SMARCB1 brain tumor, SMARCB1-deficient tumor, pediatric CNS rhabdoid, rhabdoid tumor predisposition

Scale 07 — SystemScale
draftStatus
2026-06-06Last Reviewed
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atypical-teratoid-rhabdoid-tumor

Atypical Teratoid/Rhabdoid Tumor

AT/RT (atypical teratoid/rhabdoid tumor) is an aggressive CNS WHO grade 4 pediatric tumor defined by SMARCB1 biallelic LOF (~95%) or SMARCA4 LOF (~5%); peak <3 years; three molecular subgroups (TYR, SHH, MYC); multimodal therapy; 2-year OS ~40-50%; germline SMARCB1 → RTPS1.