PMC9666769_01
Imaging presentation and gross specimen of a patient with primary eRMS. (A) CT plain scan showed the enlarged and inhomogeneous density of the right testicle; (B) (arterial phase) and (C) (venous phase): CT enhanced scan showed inhomogeneous enhancement of the occupying lesion; (D) General observation.
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An enhanced CT scan observed a tumor in the dorsal lower part of the testicle (3.3x3.0 cm), with heterogeneous enhancement found ( Figure 1 ). The pathological results showed that a gray solid tumor was seen in the right epididymal section ( Figure 1D ), and tumor cells infiltrated among epididymis ( Figure 2A ), the tumor was completely removed and the margin of vas deferens and spermatic cord were negative.
Microscopic pathology of primary eRMS. (A) Heterotypic cells were seen between the tissues of the right epididymis; (B) tumor size was about 3.5x3.2x2.5 cm; (C) Desmin (+); (D) Myogenin (+).
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The pathological results showed that a gray solid tumor was seen in the right epididymal section ( Figure 1D ), and tumor cells infiltrated among epididymis ( Figure 2A ), the tumor was completely removed and the margin of vas deferens and spermatic cord were negative. The final immunohistochemical staining was as follows: Vimentin, Desmin Myogenin, MyoD1, SMA, CD56, ALK, S-100 polyclonal (+), Fli-1 (weak +), CD99 (partial cell +), Ki-67 (40%-60% +), WT-1 (-), CK wide (-), EMA (-) ( Figure 2 ); FOX gene translocation (+).