Virchows Archiv : an international journal of pathology · 2024
Characterization of testicular embryonic-type neuroectodermal tumor and embryonic-type neuroectodermal tissue admixed with mature neuro-glial tissue using a broad immunohistochemical panel.
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Di Sciascio Luisa, Orsatti Agnese, Ambrosi Francesca, Franchini Eugenia, Massari Francesco, Mollica Veronica, Bianchi Federico Mineo, Colecchia Maurizio, De Leo Antonio, Acosta Andres Martin, Lobo João, Fiorentino Michelangelo, Ricci Costantino
Аннотация
Embryonic-type neuroectodermal tumor (ENT) is a somatic-type malignancy characterized by overgrowth of embryonic-type neuroectodermal tissue (EtNT). In germ cell tumors, EtNT is frequently intermingled with other components that may exhibit significant morphologic overlap [mature neuro-glial tissue (MNGT), nephroblastomatous tissues, and primitive endodermal-type glands]. Therefore, the quantification of EtNT (crucial for the diagnosis of ENT) can be challenging. In this study, we investigated the immunohistochemical profile of ENT, EtNT, and MNGT using a broad immunohistochemical panel. We found that SOX2 was the most sensitive marker for EtNT (100%), but it also stained MNGT (28.6%). GFAP and S100 were relatively sensitive (71.4%) and highly specific (GFAP 100%, S100 85.8%) for MNGT, whereas synaptophysin stained both. Combining our results with those of previous studies, we propose that a combination of SOX11, SOX2, GFAP, S100, AFP, villin, CDX2, PAX8, and nuclear WT1 may help to identify and quantify EtNT in germ cell tumors.