From 68 hospitals i n the National Wilms' T u m o r Study, records of 547 patients showed six patients with aniridia, 16 with hemihypertrophy, and 24 with genitourinary abnormalities. Multiple cases of Wilms' tumor occurred in three families. The results confirm high frequencies of aniridia and genitourinary anomalies i n patients with Wilms' tumor, and show that concurrence with hemihypertrophy may be more often recognized or recorded now than it was ten years ago. T h e results demonstrate the desirability of developing checklists for other childhood neoplasms some of which have their own constellation of anomalies. This study was made possible by the cooperation of the investigators participating in the National Wilms' Tumoi Study. The author wishes to thank the National Wilms' Tumor Study Committee for the opportunity to review these data and to acknowledge the coopcration and assistance of the NWTS Data Center. Grateful appreciation is given for review of the manuwipt by Dr. Robert W. Miller and for the help of Mrs. Me1 Harren and Mrs. Jackie Pendergrass in abstracting and organizing the data.Received for publication January 22, 1975.
MATERIALS AND METHODST h e NWTS was designed to refine the therapy of W T by using protocol treatment schedules in a national cooperative study.4 One of the secondary objectives of the study was to evaluate the epidemiology of W T . A checklist of those anomalies known to occur with W T was included on the physician's registration form for each patient. A second form was given to each family. This family questionnaire requested details of the health of the parents and siblings and a listing of any family member with cancer, tumors, kidney ailments, allergies, growths, and birth defects.T h e physician's registration forms were reviewed for each patient and the presence of any anomaly was abstracted. These data were correlated with those from the family questionnaires. Twenty patients who had incomplete checklists and no family questionnaires available and 28 cases whose diagnoses were changed from W T were excluded from the study.
RES u LTS