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INRG staging and risk groups

INRG staging is the international system that sorts neuroblastoma into very-low, low, intermediate and high risk using age, spread, MYCN status and tumour biology.

International Neuroblastoma Risk Group (2009): stages L1/L2 (localised, by image-defined risk factors), M (metastatic), MS (infant metastatic to skin/liver/marrow). Risk groups combine stage, age (<18 months), MYCN amplification, 11q aberration, ploidy and histology. Roughly 50% of patients are high risk; very-low-risk L1/MS may be observed and regress spontaneously.

Clinical: what this kind of term is about · animated schematic, not to scale
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