histological examinations , performed on these 13 nb patients before and after chemotherapy , showed ( 1 ) differentiation of the nb to ganglioneuroblastoma ( gnb ) with predominance of mature atypical ganglion cells , development of stromal components and a few immature malignant cells in 10 of 13 and ( 2 ) differentiation of the nb to a more mature form than was seen histologically before treatment in the remaining 3 .
C0206718
ganglioneuroblastoma
C0027819
nb