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case_images: Pre-surgical MRI before surgery reveals a subcutaneous soft tissue lesion in the right zygomatic region, measuring 16*12*15 mm. The lesion exhibits isointense signal relative to muscle on T1- weighted imaging (T1W1) (A) and has intermediate to high signal intensity on T2-weighted imaging (T2W1) (B). The lesion shows vivid enhancement on the post-contrast MRI study (C).
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case_images: However, MRI results indicated an ill-defined subcutaneous lesion in the right cheek, characterized by an isointense T1 signal and a hyper-intense T2 signal, with significant contrast enhancement, measuring 16 x 15 x 12 mm (Fig. 1).
case_images: Histopathologic examination of the right cheek lesion reveals a proliferation of vascular channels accompanied by a mixed inflammatory infiltrate. The findings include nests and cords of endothelial cell proliferation, with an admixture of lymphocytes, plasma cells, and eosinophils (A). Microscopic view of eosinophils (B).
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case_images: Additionally, a few plasma cells and giant cells were observed (Fig. 2).