PMC5711662_01
Contrast-enhanced computed tomography revealed a right testicular tumor of 5.4 cm diameter with heterogeneous enhancement. No lymph-node or distant metastasis was observed.
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CEA, 3.3 ng/mL; AFP, 3 ng/mL; CA19-9, 11 U/mL; CA125, 17 U/mL; SCC, 0.8 U/mL; NSE, 11.0 U/mL; sIL-2R, 448.4 U/ml), were normal. CT revealed right testicular mass of 5.4 cm in diameter, without invasion or metastasis [Fig. 1] (see Fig. 2).
a) Histological feature of the tumor (Hematoxylin and eosin staining) (bar = 100 mum). Inset: Tumor cells showed plasmocytoid feature (bar = 50 mum). b, c) Immunohistochemically, almost all tumor cells were positive for lambda light chain (b), and negative for kappa light chain (c). (bar = 100 mum). d) Amyloid deposits were Congo red-positive (bar = 100 mum).
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Neoplastic cells showed plasmacytoid appearance of eosinophilic cytoplasm and vesicular nuclei with central nucleoli (Fig. 3a). Immunohistochemically, tumor cells were positive for lambda light chain (Fig. 3b) and negative for kappa light chain (Fig. 3c). Amyloid deposits were Congo red-positive (Fig. 3d).