Long-Term Outcomes of Sacrococcygeal Germ Cell Tumors in Infancy and Childhood

Table 2

Anatomical types of sacrococcygeal germ cell tumors and risk of malignancy.

Altman’s type	Sacrococcygeal teratoma			Endodermal sinus tumor	Total
	Mature	Immature	Malignant
I	25	4	0	0	29 (50.9%)
II	10	0	2	0	12 (21.0%)
III	3	0	0	2	5 (8.8%)
IV	3	0	4	4	11 (19.3%)
Total	41 (72.0%)	4 (7.0%)	6 (10.5%)	6 (10.5%)	57 (100%)