case_images: PMC9149486_01
case_images: US of the axilla. a A round lymph node showed very low internal echoes (asterisk) and slightly enhanced posterior echoes (arrow). b A larger lymph node had eccentric cortical hypertrophy and distinct lymph node hilum in a convex fashion (arrow).
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case_images: F1
case_images: Ultrasonography (US) showed two swollen lymph nodes, oval and round lymph nodes with or without lymph node hilum, of 27 mm and 14 mm in size, respectively (Fig. 1).
case_images: PET showed strong avidities in the axillary lymph nodes (arrow) with maximum standardized uptake value of 7.0. PET, positron emission tomography.
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case_images: F2
case_images: Positron emission tomography showed a maximum standardized uptake value of 7.0 in the swollen lymph nodes without any other avidities (Fig. 2).
case_images: Pathological findings. a Low magnified view of the resected tissue showed follicular hyperplasia (asterisks), microglanulomas (arrowheads), tingible body macrophages (arrows), monocytoid B cells (square), and no giant cells. b Magnified view showed microgranulomas (arrowheads) consisting of epithelioid cells. c Tingible body macrophages (arrows) were found in the irregularly dilated germinal center. d Aggregation of monocytoid B cells (square) with neutrophil interminglement (arrow) was observed in the dilated paracortex.
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case_images: PMC9149486_01_cro-0015-0430-g03.jpg
case_images: F3
case_images: Irregularly dilated germinal center had microglanulomas, tingible body macrophages, enlarged aggregation of monocytoid B cells with neutrophil interminglement, and no giant cells, leading to the diagnosis of toxoplasmosis (Fig. 3).