| Type | Features |
| Vascular | contains numerous vascular lumens. Enhancement very high post Gadolinium with high T2 signal. Early enhancement in angiography with increase in delayed venous phase |
| Cellular | proliferation of epitheloid cells, less vascular lumens. Difficult to detect in scans. Gadolinium does not help much. 3D GRE imaging may show a peripheral capsule, or slight bone erosion of distal phalanx |
| Mucoid | mucoid degeneration of stroma, mild enhancement post Gado. Very high T2 signal due to large amount of water in stroma |