Table 2 Descriptions of INRG tumor stages [6]
From: Assessment of the validity of image-defined risk factors (IDRFs) in abdominal neuroblastoma
Tumor stage | Description |
|---|---|
L1 | Localized tumor not involving vital structures, as defined by the list of IDRFs, and confined to one body compartment |
L2 | Local-regional tumor with presence of one or more IDRFs |
M | Distant metastatic disease (except stage MS tumor) |
MS | Metastatic disease in children younger than 18 months, with metastases confined to skin, liver, and/or bone marrow |