PMC8176203_01
CT and MRI images. (A-C) Show iso- and hyper-intense signal in T2 sequence of the patient's cranium MRI images. Panel (A) is a coronal T2 image. Panel (B) is an axial T2 image. Panel (C) is a sagittal T2 image. Panel (D) is a CT image, with the red arrow indicating the mass.
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F1
MRI showed an iso-intense signal in the T1 sequence, iso- and hyper-intense signal in the T2 sequence (Figures 1A-C) and enhancement in the T1 enhanced sequence with an unclear boundary. CT showed a soft tissue signal in the nasal forehead with an unclear boundary (Figure 1D).
Pathology images. In the proliferative fibrous tissue, there were proliferative lymphoid tissue, lymphoid follicles, a large number of eosinophils between the follicles, proliferative small vessels in the follicles, and local infiltration of striated muscle. Panel (A) is pathological images taken with an optical microscope at 40x magnification and image (B) was taken at red rectangle. Panel (B) is pathological images taken with an optical microscope at 100x magnification and image (C) was taken at red rectangle. Panel (C) is pathological images taken with an optical microscope at 200x magnification and image (D) was taken at red rectangle. Panel (D) is pathological images taken with an optical microscope at 400x magnification which show many eosinophils in the tissue.
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F2
The pathological findings were as follows: in the hyperplastic fibrous tissue, there were hyperplastic lymphoid tissues, lymphoid follicles, a large number of eosinophils between follicles and small hyperplastic blood vessels in the follicles, which focally infiltrated striated muscle (Figure 2).