Synonym for blastoma ... <tumour> A neoplasm composed chiefly or entirely of immature undifferentiated cells (i.e., blast forms), with little or virtually no stroma. ... Synonym: blastocytoma, embryonal carcinosarcoma. ... Origin: blasto-+ G. -oma, tumour ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973