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Figure 1: (a) Yolk sac tumor with microcystic pattern, transrectal ultrasound-guided biopsy. (b) Strong membranous positivity with alpha-fetoprotein, immunohistochemistry. (c) Retinal anlage-like areas in transrectal ultrasound biopsy. (d) Gross picture with pigmented seminal vesicle lesion infiltration bladder and rectal wall. The right seminal vesicle lesion (blue arrow), yellow arrow-rectal wall. (e) Teratomatous components. (f-h) High-grade glioma-like areas with necrosis, endocapillary proliferation, atypia, and increased cellularity. (i) Strong expression of the glial fibrillary acidic protein in the glial component, immunohistochemistry

Figure 1: (a) Yolk sac tumor with microcystic pattern, transrectal ultrasound-guided biopsy. (b) Strong membranous positivity with alpha-fetoprotein, immunohistochemistry. (c) Retinal anlage-like areas in transrectal ultrasound biopsy. (d) Gross picture with pigmented seminal vesicle lesion infiltration bladder and rectal wall. The right seminal vesicle lesion (blue arrow), yellow arrow-rectal wall. (e) Teratomatous components. (f-h) High-grade glioma-like areas with necrosis, endocapillary proliferation, atypia, and increased cellularity. (i) Strong expression of the glial fibrillary acidic protein in the glial component, immunohistochemistry