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Ganglioside profile was evaluated in 19 samples of tumor tissue obtained from 13 surgical patients with various morphological patterns of neuroblastoma. In six of those cases, two samples from each proving most different in terms of cell maturity were selected for examination. The relative content of GD2 gangliosides was 27.0-37.6% in sympathoblastoma and as low as 5.1-14.8% in ganglioneuroblastoma. Ganglioneuroblastomas showed fairly high levels of GM1 and GD1a gangliosides which were almost completely absent in sympathoblastomas. Ganglioside profile variations seen within each tumor type were incomparable with differences in profile established between morphological patterns of neuroblastoma studied.
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