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Fig 4. MR images of 3.4-year-old boy with a hemorrhagic AT/RT in the frontal lobe.
A, Sagittal (TR/TE, 520/10) MR image shows a hemorrhagic lesion in the inferior left frontal lobe.
B, Sagittal (TR/TE, 600/22) MR image shows edge enhancement of the lesion.
C and D, Sagittal (C) (TR/TE, 520/10) and axial (D) (TR/TE, 520/10) MR images obtained 7 months after A, -B show marked interval enlargement of the lesion, which has heterogeneous mixed low, intermediate, and high signal intensity involving the inferior portions of both frontal lobes.
E, Axial (TR/TE, 5700/90) MR image shows the tumor to have mixed low, intermediate, and high signal intensity, with evidence of edema in the surrounding brain tissue.
F, Axial (TR/TE, 600/22) MR image shows prominent heterogeneous contrast enhancement of the tumor with irregular lobulated margins. This patient underwent partial resection of the AT/RT, subsequently had disseminated leptomeningeal tumor, and died 3.3 years after surgery/initial diagnosis.
G, Axial CT image shows the lesion to have intermediate attenuation with multiple calcifications and zones of low attenuation.
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