Is the prognosis of stage 4s neuroblastoma in patients 12Â months of age and older really excellent?

In the children 12 months of age and older, stage 4s cases are markedly different from stage 4 cases in regard to the clinical features and prognosis. The prognosis of stage 4s cases from ⩾12 to ⩽17 months of age is excellent. The concept of stage MS appears to be appropriate.