Table 1.

Expression of B7-H3 on pediatric tumors by IHC

			Intensity
Tumor type	# Stained	Positive (%)	3+ (%)	2+ (%)	1+ (%)	0 (%)
Alveolar rhabdomyosarcoma	12	92%	25%	50%	17%	8%
Embryonal rhabdomyosarcoma	10	100%	40%	60%	0%	0%
Ewing sarcoma family of tumors	27	89%	30%	15%	44%	11%
Wilms tumor	12	100%	67%	33%	0%	0%
Neuroblastoma	186	82%	28%	29%	25%	18%
Ganglioneuroblastoma	25	60%	8%	4%	48%	40%
Ganglioneuroma	11	36%	0%	9%	27%	64%
Medulloblastoma	46	96%	61%	22%	13%	4%
High-grade glioma (WHO grade 3/4)	37	84%	35%	16%	33%	16%
Diffuse intrinsic pontine glioma	22	100%	45%	32%	23%	0%
Total	388	84%	34%	25%	25%	16%