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Pathology revealed that the vaginal tumor was SMs (sarcoma) derived from YST.
Notes: (A) Fusiform tumor cells with moderate to severe nuclear atypia (H&E, 400×); (B–D) immunonegativity for AE1/AE3, GPC3, and SALL4 in tumor cells (IHC staining, 400×).
Abbreviations: IHC, immunohistochemistry; SMs, somatic-type malignancies; YST, yolk sac tumor.
