Soft Tissue Mass
	MRI	p-value	X-ray	p-value
EWS	22/29	<0.001	16/30	0.0065
OM	07/28/13		05/01/32
	Single-layer Periosteal Reaction
EWS	8/29	<0.001	11/30	<0.0001
OM	09/28/13		12/01/32
	Multi-layered Periosteal Reaction
EWS	11/29	0.17	14/30	0.0051
OM	10/28/13		04/01/32
	Spiculated Periosteal Reaction
EWS	22/29	0.12	24/30	0.059
OM	18/28		18/32
	Wide Transition Zone
EWS	21/29	0.20	27/30	0.057
OM	25/28		23/32
	Metaphyseal Involvement
EWS	24/29	0.79	22/30	0.15
OM	21/28		16/32
	Cortical Involvement
EWS	28/29	0.013	29/30	0.0066
OM	20/28		21/32
	Superficial or Deep Soft Tissue Edema
EWS	24/29	0.11	12/30	0.14
OM	27/28		19/32
	Codman Triangle
EWS	2/29	0.0019	8/30	0.011
OM	0/28		01/01/32