The occurrence of multiple lymphoreticular and hematological malignancies in the same households.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002140:California; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007938:Leukemia / Q000235:genetics* / Q000635:transmission; D008223:Lymphoma / Q000235:genetics* / Q000635:transmission; D008297:Male; D008875:Middle Aged; D013029:Space-Time Clustering