NCIt definition : A chemotherapy regimen that is similar to regimen M, consisting of vincristine, dactinomycin
and doxorubicin plus cyclophosphamide and etoposide, but in which some of the high-dose
cyclophosphamide and etoposide cycles are replaced by vincristine and irinotecan to
minimize toxicity and that may be used in the treatment of Wilms tumor.;