SK-N-DZ are neuroblasts that were isolated from the brain of a 2-year-old, White female patient with neuroblastoma.SK-N-DZ are neuroblasts that were isolated from the brain of a 2-year-old, White female patient with neuroblastoma. Expression of the N-myc gene product was reduced in differentiated SK-N-DZ cells as compared with undifferentiated cells. Expression of the c-src gene product, pp60c-src was enhanced in differentiated SK-N-DZ cells as was tyrosine phosphorylation of cellular proteins. The cells exhibit moderate MDR1 expression. Retinoic acid induces differentiation in this line.