ATRT and ETMR: distinct tumors, shared clinical challenges-a comparative narrative review.
AI interpretation is pending for this paper.
Open original publication →What the AI sees
Not AI summarized yet.
Research significance
Pending deeper interpretation.
Source abstract
Atypical teratoid/rhabdoid tumor (ATRT) and embryonal tumor with multilayered rosettes (ETMR) are rare, highly aggressive embryonal tumors of the central nervous system (CNS) arising in early childhood. Molecular advances have improved diagnostic classification, but important therapeutic uncertainties persist. This comparative narrative review provides a practical framework for the diagnostic and therapeutic approach to ATRT and ETMR, examining their epidemiology, clinical and radiological features, treatment strategies, patterns of failure, and emerging therapeutic approaches. Multimodal treatment incorporating maximal safe resection, intensive chemotherapy, and radiotherapy remains central to management. Across both tumors, radiotherapy is the treatment component most consistently associated with improved outcomes in available studies, although its optimal timing, field, and integration with high-dose chemotherapy remain incompletely defined. Proton therapy may be particularly relevant in this very young population by reducing radiation exposure to developing normal tissues. Although ATRT and ETMR share several radiological features, differences in anatomical distribution and imaging characteristics may assist their recognition in the appropriate clinical setting. Patterns of failure also differ: ETMR is characterized by early, predominantly local relapse, whereas ATRT has a marked propensity for metastatic recurrence. These distinctions support emphasis on durable local control in ETMR and integrated systemic and CNS-directed strategies in ATRT. The evidence base is more mature for ATRT, supported by prospective cooperative studies, whereas ETMR remains informed predominantly by small, retrospective, and heterogeneous cohorts in which the independent contribution of individual treatment modalities remains difficult to define. By comparing the available evidence and recent and ongoing clinical studies, this review aims to assist clinicians in navigating current diagnostic and therapeutic decisions while highlighting priorities for future research.