case_images: PMC10646748_01
case_images: Histology H&E: (A,B) serous papillary tumor: complex papillary structures lined by columnar cells (high magnification), C) showing papillary arrangement and a hobnail-like pattern of the tumoral cells with mild to moderate pleomorphism, vesicular nuclei; and eosinophilic cytoplasm (x20), D) showing micropapillary pattern (x40)
case_images: ijp-18-476-g001.jpg
case_images: PMC10646748_01_ijp-18-476-g001.jpg
case_images: F1
case_images: A homogenous lobulated mass measuring 23 x 21 x 20 mm with an exophytic growth pattern originating from the right epididymis and some foci of peripheral calcification around was seen (Figure 1).
case_images: Immunohistochemi
  cal
   staining of 
  the s
  erous borderline tumor of the testis: The lining epithelial tumoral cells express CK7 (a; x200); Estrogen receptor was positive in more than 90% of the tumoral cells (b; x200), CA125 positive staining in the tumoral cells (c; x200). The Ki67 staining exhibits low proliferative activity (d; x200), Calretinin negative staining (E; x200).CEA negative staining (F; x400)
case_images: ijp-18-476-g002.jpg
case_images: PMC10646748_01_ijp-18-476-g002.jpg
case_images: F2
case_images: CK5/6 showed to be positive in the tumoral cells. ER was positive in more than 90% of the tumoral cells, and Ki-67 was positive in about 5% of the tumoral cells. Calretinin and CEA were negative in the tumoral cells (Figure 2).
case_images: PMC10646748_02