PMC8243095_01
Pelvic-enhanced MRI showed mild enhancement of the lesion, and the lesion
seemingly not invaded muscular layer.
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Pelvic-enhanced magnetic resonance imaging (MRI) showed a mild enhancement of the lesion, and the lesion seemingly not invaded muscular layer (Figure 1).
Histological features of endometrial YST. Multiple separated tumor tissue
with a small piece of normal endometrium (A x20), most area showing a
tubulopapillary pattern (B x40) with classical Schiller-Duval bodies (C
x100), a microcystic or reticular pattern (D x100), and focal glandular
pattern (E x400), hyaline globules in the cytoplasm (F x200).
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Microscopically, pure endometrial YST without any other type of germ cell tumor or somatic carcinoma components was found (Figure 2).
Immunohistochemical profile of endometrial YST. Diffuse positive for AFP (A
x100), GPC-3 (B x100), SALL-4 (C x100), and AE1/AE3 (D x100). Focal positive
for PAX8 (E x100) and negative for EMA (F x100).
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ER, PR, CD30, OCT4, HNF-1beta, Napsin A, and CD117 were all negative (Figure 3).