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Axial MR images.
A, T1-weighted image reveals a well-circumscribed, elongated tumor occupying the hypoglossal canal (arrow). The T1 signal intensity is homogeneously isointense relative to gray matter.
B, On the corresponding T2-weighted image, the mass is also uniformly isointense relative to gray matter.
C, After the intravenous injection of contrast material, homogeneous enhancement of the tumor is observed.
