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mately 200/, of all malignant tumors of childhood. It originates from the mesodermal cells formed in the embryo: these cells retain their ability to grow and differentiate.l A clinician confronted by a case of Wilms's tumor must inevitably face the parents' question, "What are my child's chances of survival?" Turning to the literature, the clinician will meet a bewildering array of statistics. Quoted survival figures range from 8 x 7 to 47y0.+3 Adding to the confusion, criteria for survival are not clearly defined. A single paper may use several different criteria and some papers may present "cure rates" without defining the term.6 The clinician will find it impossible to select a reasonable figure to present to the parents as representing their child's chances of survival.
Platt et al. (Tue,) studied this question.