case_images: PMC11439167_01
case_images: (a) On magnetic resonance imaging, the cystic part of the tumor showed a high signal, measuring approximately 5.8 cm x 5.3cm, solid part displayed a low signal, with a small nodular slightly high signal within a size of about 4.2 cm x 3.3cm. (b) The tumor was cystic and solid, the solid part was 4 cm x 3 cm x 2.8 cm in size, soft and lobulated texture (the circle).
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case_images: Notably, the solid components demonstrated marked heterogeneous enhancement on the contrast-enhanced images, suggesting a suspected malignant tumor (Figure 1(a)). The solid portion was lobulated and measured around 4 cm x 3 cm x 2.8 cm (Figure 1(b)).
case_images: Histological morphology of the mixed epithelial and stromal tumor of the seminal vesicle: (a) The tumor was mainly composed of mesenchymal elements, and the surface was covered by epithelial cells (H&E 20x). (b) The epithelial layer and stroma predominantly exhibit a polypoid or leaf-like growth pattern (H&E 40x). (c) Focal epithelium forms cystic cavities within the stroma (H&E 20x). (d) The epithelium was composed of multilayered cuboidal cells with mild morphology and loose distribution of stromal cells without atypia or mitosis (H&E 400x).
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case_images: The epithelial cells were characterized by single or multi-layered cuboidal epithelium, while the stromal spindle cells were arrayed loosely with no evidence of atypia or mitotic activity (Figure 2).
case_images: Immunohistochemical examination: (a) and (b), respectively, revealed that the stromal cells are positive for both ER and PR (EnVision 100x).
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case_images: The stromal cells are positive for both ER and PR (Figure 3).