Genetic instability resulting from deficiency in replication error rep
air (RER) has been detected in a variety of human cancers. We have exa
mined the stability of five 1p microsatellites in 51 human neuroblasto
mas including stages 1, 2, 3, 4 and 4s. None of the tumors showed an a
berrant pattern indicating RER at any microsatellite. Our results do n
ot support a major role for increased genetic instability as the resul
t of deficient replication error repair in neuroblastoma.