Three Cases of Organized Hematoma of the Maxillary Sinus: Clinical Features and Immunohistological Studies for Vascular Endothelial Growth Factor and Vascular Endothelial Growth Factor Receptor 2 Expressions

Figure 2

MRI findings of Case 1. (a) On T₁-weighted imaging, the central region () has a slightly lower intensity compared to that of the muscle. (b) On T₂-weighted imaging, the central region () demonstrates high intensity, and the periphery (▲) has lower intensity than the central region. Thickening of the paranasal mucosa is observed (). (c) On contrast-enhanced T₁-weighted imaging, the central region is strongly enhancing (), while the periphery (▲) demonstrates less enhancement than the central region. Additionally, the thickened mucosa of the paranasal sinus are strongly enhanced ().

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