PMC3985780_01
Axial T1-weighted spin-echo imaging (491/11) (TR/TE) performed before radiotherapy demonstrated an isointense tumor in the right orbital space and the right ethmoid sinus (arrow). The right optic nerve was involved by the tumor.
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F1
The diagnosis of a tumor of the right orbit was made based on clinical and MRI findings (fig. 1).
Histological section showing Kimura' s disease. HE.
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F2
There was no evidence of lymphoid follicle growth or malignancy, leading to a pathological diagnosis of Kimura's disease after considering the blood test results (fig. 2).
Dose distribution. One oblique field is shown.
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F3
A single anterior oblique portal was used to avoid radiation exposure of the right lens (fig. 3).
Eighty-four months after radiotherapy, axial T1-weighted spin-echo imaging (440/150) (TR/TE) demonstrated the disappearance of the right orbital tumor.
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F4
Neither tumor regrowth nor late complications were detected up to 84 months after radiotherapy (fig. 4).