Fig. 2
Stem cell expression by tumor histology. a Unsupervised hierarchical clustering analysis of normalized ΔCt values. Blue indicates high levels of expression and red indicates low levels of expression. The mixed tumor that clustered with the teratomas rather than the other mixed tumors included components of teratoma and YST. b Genes with ≥ 3 fold (log2 fold > 1.58) up- or down-regulation in YST compared with germinoma. Bar color represents gene pathway. Four samples were excluded due to missing data (1 YST, 1 teratoma, and 2 normal adjacent)