PMC7085942_01
Advanced magnetic resonance imaging of the case. (
A
) Contrasting axial image in T1 with gadolinium, (
B
) perfusion map rCBV, (
C
) image fusion rCBV/MRI. Nodular area of contrast enhancement in the dorsal margin of the biopsy tract, with elevated rCBV, suggesting hyperperfusion (arrows). MRI, magnetic resonance imaging; rCBV, relative cerebral blood volume.
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FI180022-1
 During a routine evaluation, 4 months after completion of radiation therapy, a magnetic resonance imaging (MRI) revealed a nodular area of contrast enhancement dorsal and inferior to the margin of the biopsy tract, growing between interval scans ( Fig. 1 ).
Low power (x40 original magnification) micrograph of Txm showing optically clear bundles of foreign material (
*
) with morphology consistent with oxidized cellulose that is used for hemostasis. The left portion of the micrograph shows fibrosis, hemosiderin-laden macrophages, and chronic inflammation (H & E). H & E, hematoxylin and eosin.
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FI180022-2
The pathology returned as a Txm with Surgicel fibers ( Fig. 2 ).