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MRI of subperiosteal hematoma of the orbit
H Tonami1, Y Kuginuki, T Okimura
1Department of Radiology, Kanazawa Medical University, Ishikawa, Japan.
Objective:
The MR findings of two cases of subperiosteal hematoma of the orbit are described.
Materials And Methods:
We present two cases of subperiosteal hematoma of the orbit following minor head trauma, the first presenting with chronic progressive exophthalmos and the second with acute proptosis.
Results:
Both cases showed a well-defined biconvex mass with a curvilinear hypointense band in the superior portion of the orbit. In Case 1 chronic hematoma demonstrated high signal on both T1- and T2-weighted imaging, and in Case 2 acute hematoma displayed intermediate signal on T1-weighted imaging and high signal on T2-weighted imaging. Follow-up MRI in Case 2 demonstrated the typical signal changes from acute to subacute hematoma.
Conclusion:
Subperiosteal hematoma has a characteristic appearance on MRI which is virtually diagnostic. In proper clinical settings MRI is the modality of choice for the detection and characterization of this hematoma.