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. 2026 Jul 13;17:1799414. doi: 10.3389/fendo.2026.1799414

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Copyright © 2026 Lv, Chen, Wang, Li, Bian, Cui, He, Dong, Chen, Zhao, Zhang and Liu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Nine-panel figure showing microscopic histology and immunohistochemistry images. Row A, B, and C each contain three panels labeled 1, 2, and 3. Leftmost panels (A1, B1, C1) show hematoxylin and eosin-stained tissue with varying cell densities and structures. Middle and right panels (A2–A3, B2–B3, C2–C3) show brown immunostaining with different intensities and cellular patterns, likely for distinct markers. Each panel includes a scale bar for reference. — Microscopic findings. The tumor comprises a uniform population of round to polyhedral cells with granular, eosinophilic cytoplasm ((A1, B1, C1) ×20, ×10, respectively). The tumor cells stain positive for CD34 ((A2, B2, C2) ×40). The tumor cells stain positive for vimentin ((A3, B3, C3) ×40).