PMC7570770_01
Bilateral cervical computed tomography images showing masses measuring approximately 10 mm in the posterior auricular areas, with scattered small lymph nodes (A). Cervical T1-weighted magnetic resonance image showing isointense signals (B) and high-intensity signals on T2-weighted (C) and T2-weighted fat-suppressed images (D).
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Computed tomography showed 10-mm soft tissue masses with scattered lymphadenopathy in bilateral postauricular regions (Figure 1A). Isointense signals were observed on T1-weighted magnetic resonance images (Figure 1B), and high-intensity signals were observed on T2-weighted images and T2-weighted fat-suppressed images (Figure 1C and D).
Large and small lymphoid follicles are prominent in the connective tissue, which consists of collagen fibers and vascularization. Eosinophilic abscesses are also seen (A). Prominent infiltration of lymphocytes, plasma cells, and eosinophils is seen among the lymphoid follicles (B).
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Histopathology of the resected masses revealed germinal center hyperplasia, postcapillary venous proliferation, eosinophilic infiltration, and eosinophilic abscesses (Figure 2A and B).