Differential CT and MR imaging diagnosis between low- and high-grade malignant vascular tumors of bone

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Table 2 Summary of imaging features in 18 cases

Case	Radiological features		Diagnosis
Case	CT	MRI	Diagnosis
1	Purely lytic	No MRI obtained	HE
2	Lytic, lattice-like trabeculation, cortical destruction, compression, paraspinal mass, artery passed through the lesion without involvement	No MRI obtained	HE
3	Lytic	Hypo/isointense on T1, hyperintense on T2, heterogeneous enhancement with strong enhancement	ES-H
4–6	Lytic, multiple, lobulated, residual bone	Heterogeneous hypointense on T1, hyperintense on T2, periotumoral hypointense rim	EHE
7	Lytic, multiple, geographic	Ill-defined, cystic/necrotic, infiltrative, heterogeneous hypointense on T1, hyperintense on T2, slightly heterogeneous enhancement	EHE
8, 10, 15	Lytic	Hypointense on T1, slightly heterogeneous hyperintense on T2, obviously heterogeneous enhancement	AS
9	Lytic, pathologic fracture	Ill-defined, hypointense on T1,hyperintense on T2, homogeneous enhancement	AS
11, 13, 16	Lytic	Ill-defined, mixed hypo-/hyperintense on T1 and T2, massive shape, obviously heterogeneous enhancement	AS
12	Lytic, multiple, residual bone	Hypointense on T1, slightly hypo/hyperintense on T2, slightly heterogeneous enhancement	AS
14	Lytic-slerotic, large soft-tissue mass, residual bone	Markedly hypo/hyperintense on T1 and T2, macroscopic cystic/necrosis, obviously heterogeneous enhancement	AS
17	Lytic	Ill-defined, isointense on T1, iso/hyperintense on T2, obviously heterogeneous enhancement	EA
18	Lytic, pathologic fracture	Ill-defined, hypo/hyperintense on T1 and T2, hemorrhage, obviously heterogeneous enhancement	EA